Answer:
a) margin of error ME = 5.77
b) Margin of error becomes smaller
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
x+/-zr/√n
x+/-ME
Where margin of error ME = zr/√n
a)
Given that;
Mean = x
Standard deviation r = 25
Number of samples n = 72
Confidence interval = 95%
z(at 95% confidence) = 1.96
Substituting the values we have;
ME = 1.96(25/√72)
ME = 1.96(2.946278254943)
ME = 5.774705379690
ME = 5.77
b)
For n = 89
ME = 1.96(25/√89)
ME = 1.96(2.649994700015)
ME = 5.193989612031
ME = 5.19
5.19 is smaller than 5.77 in a) above. So,
Margin of error becomes smaller
A cone with radius 5 and height 12 has its radius doubled. How many times greater is the volume of the larger cone than the smaller cone? Use a pencil and paper. Explain how the volume of the cone would change if the radius were halved.
Answer:
[tex] V = \frac{1}{3} \pi (5)^2 (12)= 314.159[/tex]
Now if we increase the radius by a factor of 2 the new volume would be:
[tex] V_f = \frac{1}{3} \pi (2*5)^2 (12)= 1256.637[/tex]
And we can find the increase factor for the volume like this:
[tex] \frac{V_f}{V}= \frac{1256.637}{314.159}= 4[/tex]
Then if we increase the radius by 2 the volume increase by a factor of 4
If we reduce the radius by a factor of 2 then we will have that the volume would be reduced by a factor of 4.
On the figure attached we have an illustration for the cases analyzed we see that when we increase the radius the volume increase and in the other case decrease.
Step-by-step explanation:
For this case we have the following info given:
[tex]r = 5 , h =12[/tex]
and we can find the initial volume:
[tex] V = \frac{1}{3} \pi r^2 h[/tex]
And replacing we got:
[tex] V = \frac{1}{3} \pi (5)^2 (12)= 314.159[/tex]
Now if we increase the radius by a factor of 2 the new volume would be:
[tex] V_f = \frac{1}{3} \pi (2*5)^2 (12)= 1256.637[/tex]
And we can find the increase factor for the volume like this:
[tex] \frac{V_f}{V}= \frac{1256.637}{314.159}= 4[/tex]
Then if we increase the radius by 2 the volume increase by a factor of 4
If we reduce the radius by a factor of 2 then we will have that the volume would be reduced by a factor of 4.
On the figure attached we have an illustration for the cases analyzed we see that when we increase the radius the volume increase and in the other case decrease.
What is the value of y?
Answer:
[tex] \boxed{D. \: 40\degree} [/tex]
Step-by-step explanation:
Angle sum property of triangle states that the sum of interior angles of a triangle is 180°
So,
[tex] = > 2y \degree + (y + 10)\degree + 50\degree = 180\degree \\ \\ = > 2y\degree + y\degree + 10\degree + 50\degree = 180\degree \\ \\ = > 3y\degree + 60\degree = 180\degree \\ \\ = > 3y\degree = 180\degree - 60\degree \\ \\ = > 3y\degree = 120\degree \\ \\ = > y = \frac{120\degree}{3\degree} \\ \\ = > y = 40\degree [/tex]
A pair of dice was rolled many times
and the results appear below. Based
upon these results, what is the
experimental probability of rolling a
multiple of 3?
7
8
9
10 11 12
Outcome 23
35 6
Frequency 3 6 8 11 14
16
15
12
9
5 1
Answer:
6%
Step-by-step explanation:
Out of 100 rolls, there were 6 instances of 3. The experimental probability of rolling a 3 is ...
6/100 = 6%
A researcher is interested in attitudes towards releasing prisoners with Alzheimer's who have a life sentence. 85 randomly selected Americans were asked, "Prisoners with Alzheimer's who have a life sentence should be released: Strongly Agree, Agree, Disagree, Strongly Disagree". Match the vocabulary word with its corresponding example.
Answer and Step-by-step explanation:
The matching of the vocabulary word with its corresponding example is shown below:-
a. Data - The list of answers that the 85 Americans give.
Data refers the information that is to be collected.
b. Variable - The answer "Strongly Agree" or "Agree" or "Disagree" or "Strongly disagree".
Variable refers the changes of the expression according to the context.
c. Parameter - The proportion of all Americans who strongly agree that prisoners with life sentences who has Alzheimer's should be released.
A parameter is a quantity that affects a mathematical object's production or behavior, but is considered constant
d. Statistics - The proportion of 85 Americans surveyed who strongly agree that prisoners with life sentences who has Alzheimer's should be released.
Statistics is a field of mathematics involved in data collection, organisation and analysis.
e. Sample - The 85 Americans who participated in the survey.
A sample is the result of an experiment on randomly.
f. Population - All Americans
Population refers to the number of the public.
Answer:
a. Data - The list of answers that the 85 Americans give.
Data refers the information that is to be collected.
b. Variable - The answer "Strongly Agree" or "Agree" or "Disagree" or "Strongly disagree".
Variable refers the changes of the expression according to the context.
c. Parameter - The proportion of all Americans who strongly agree that prisoners with life sentences who has Alzheimer's should be released.
A parameter is a quantity that affects a mathematical object's production or behavior, but is considered constant
d. Statistics - The proportion of 85 Americans surveyed who strongly agree that prisoners with life sentences who has Alzheimer's should be released.
Statistics is a field of mathematics involved in data collection, organisation and analysis.
e. Sample - The 85 Americans who participated in the survey.
A sample is the result of an experiment on randomly.
f. Population - All Americans
Population refers to the number of the public.
Step-by-step explanation:
Hurry please !!!
The graph of g(x) is a translation of y = V.
Which equation represents g(x)?
ly
g(x) = - 4
5
4
g(x) = 3/X+4
3
27
900)
O g(x) = 5x +1.5
1
g(x) = -1.5
-10 -3 -6 -21
2
6
810
X
Answer:
The translation corresponds to : [tex]g(x)=\sqrt[3]{x-4}[/tex]
which is the first option in your list of possible answers
Step-by-step explanation:
Notice that this new function's graph responds to a horizontal translation to the right of the original graph of [tex]f(x)=\sqrt[3]{x}[/tex]. Notice that the crossing of the x-axis, which for f(x) is at the origin (0, 0), has now moved to the point (4,0), which means a translation to the right in exactly 4 units.
Recall that horizontal translations are performed by subtracting from the independent variable (x) , the number of units you move (in this case 4)
Therefore the new function should look like:
[tex]g(x)=\sqrt[3]{x-4}[/tex]
The answer is A.
did the test
Given the point (4,5) and the slope of 6 find y when x=24
Answer:
2
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
A worker is paid $2,350 monthly and has $468 withheld from each monthly paycheck. Which of the following is her annual net salary
Could someone please give me the answer to this?
Answer:
? = 8.77
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
sin theta = opposite/ hypotenuse
sin 20 = 3/?
? = 3 / sin 20
? =8.7714132
To the nearest hundredth
? = 8.77
We can use the trigonometric function [ sin theta = opposite/hypotenuse ] to solve.
sin(20) = 3/hypotenuse
hypotenuse = 3/sin(20)
hypotenuse = 8.7714...
Round to the nearest hundredth.
8.7714... → 8.77
Therefore, the answer is 8.77
Best of Luck!
Samir is an expert marksman. When he takes aim at a particular target on the shooting range, there is a 0.950.950, point, 95 probability that he will hit it. One day, Samir decides to attempt to hit 101010 such targets in a row.
Assuming that Samir is equally likely to hit each of the 101010 targets, what is the probability that he will miss at least one of them?
Round your answer to the nearest tenth.
Answer:
40.1% probability that he will miss at least one of them
Step-by-step explanation:
For each target, there are only two possible outcomes. Either he hits it, or he does not. The probability of hitting a target is independent of other targets. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
0.95 probaiblity of hitting a target
This means that [tex]p = 0.95[/tex]
10 targets
This means that [tex]n = 10[/tex]
What is the probability that he will miss at least one of them?
Either he hits all the targets, or he misses at least one of them. The sum of the probabilities of these events is decimal 1. So
[tex]P(X = 10) + P(X < 10) = 1[/tex]
We want P(X < 10). So
[tex]P(X < 10) = 1 - P(X = 10)[/tex]
In which
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 10) = C_{10,10}.(0.95)^{10}.(0.05)^{0} = 0.5987[/tex]
[tex]P(X < 10) = 1 - P(X = 10) = 1 - 0.5987 = 0.401[/tex]
40.1% probability that he will miss at least one of them
Need Help With This:
(8x^3 + x^2 - 5) / (x-6)
Answer:
the answer is 8x^2+49x+294+1759/x-6
Keep gettin this one wrong please help
Answer:
30 Nickels and 188 Pennies
Step-by-step explanation:
okay, so to set up the equation first, we have to assign each coin a variable, let's call them p and n:
P= number of pennies
N= number of nickels
the value of a penny is 1 cent, so 1P, and the value of a nickel is 5 cents, so 5N
The problem states that he has 218 coins, meaning that the total number of pennies and nickels adds up to 218:
P + N = 218
the total value of the coins is $3.38, so that would mean that 1P + 5N has to equal $3.38:
1P + 5N = 338
Okay, so now that we have our equations let's solve them using elimination:
we have to get a common coefficient between both equations, so let's multiply our first equation by 5:
P x 5 = 5P
N x 5 = 5N
218 x 5 = 1090
so, now we can solve by elimination:
5P + 5N = 1090
1P + 5N = 338
the N's cancel out:
4P = 752
divide both sides by 4:
P = 188
okay, so if theres a total of 218 coins, subtract 188 from 218:
218 - 188 = 30
so, there are 30 nickels and 188 pennies.
check our work:
5 x 30 = 150
1 × 188 = 188
150 + 188 = 338
338 = 338
I hope this helps! :)
On average, 28 percent of 18 to 34 year olds check their social media profiles before getting out of bed in the morning. Suppose this percentage follows a normal distribution with a random variable X, which has a standard deviation of five percent. Find the probability that the percent of 18 to 34 year olds who check social media before getting out of bed in the morning is, at most, 32. Round your answer to four decimal places.
Answer:
0.7881 = 78.81% probability that the percent of 18 to 34 year olds who check social media before getting out of bed in the morning is, at most, 32.
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question:
[tex]\mu = 28, \sigma = 5[/tex]
Find the probability that the percent of 18 to 34 year olds who check social media before getting out of bed in the morning is, at most, 32.
This is the pvalue of Z when X = 32. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{32 - 28}{5}[/tex]
[tex]Z = 0.8[/tex]
[tex]Z = 0.8[/tex] has a pvalue of 0.7881
0.7881 = 78.81% probability that the percent of 18 to 34 year olds who check social media before getting out of bed in the morning is, at most, 32.
The triangle shown below has an area of 16 units2.
Find z.
4
2
units
Answer:
8 units
Step-by-step explanation:
The area of a triangle is given by
A = 1/2 bh where b is the base and h is the height
16 = 1/2 (4)*x
16 = 2x
Divide each side by 2
16/2 = 2x/2
8 =x
Subtract the fractions and reduce to lowest terms: 89-6 2/3
Answer:
82 1/3
Step-by-step explanation:
89 - 6 2/3
Borrow 1 from the 89 in the form of 3/3
88 + 3/3 - 6 2/3
88 3/3 - 6 2/3
Subtract the whole numbers
88-6 =82
Subtract the fractions
3/3 - 2/3 = 1/3
82 1/3
Find the roots of the quadratic equation 3y² - 4y+1=0 By
i) completing the square method
ii) the formula
Answer:
i) [tex] 3y^2 -4y +1=0[/tex]
We can divide both sides of the equation by 3 and we got:
[tex] y^2 -\frac{4}{3}y +\frac{1}{3}=0[/tex]
Now we can complete the square and we got:
[tex] (y^2 -\frac{4}{3}y +\frac{4}{9}) +(\frac{1}{3} -\frac{4}{9})=0[/tex]
[tex] (y- \frac{2}{3})^2 =\frac{1}{9}[/tex]
We take square root on both sides and we got:
[tex] y-\frac{2}{3}= \pm \frac{1}{3}[/tex]
And the solutions for y are:
[tex] y_1 = \frac{1}{3} +\frac{2}{3}=1[/tex]
[tex] y_1 = -\frac{1}{3} +\frac{2}{3}=\frac{1}{3}[/tex]
ii) [tex] y =\frac{-b \pm \sqrt{b^2 -4ac}}{2a}[/tex]
And with [tex] a = 3, b=-4 and c =1[/tex] we got:
[tex] y =\frac{4 \pm \sqrt{(-4)^2 -4(3)(1)}}{2*3}[/tex]
And we got:
[tex] y_1 = 1 , y_2 =\frac{1}{3}[/tex]
Step-by-step explanation:
Part i
For this case we have the following function given:
[tex] 3y^2 -4y +1=0[/tex]
We can divide both sides of the equation by 3 and we got:
[tex] y^2 -\frac{4}{3}y +\frac{1}{3}=0[/tex]
Now we can complete the square and we got:
[tex] (y^2 -\frac{4}{3}y +\frac{4}{9}) +(\frac{1}{3} -\frac{4}{9})=0[/tex]
[tex] (y- \frac{2}{3})^2 =\frac{1}{9}[/tex]
We take square root on both sides and we got:
[tex] y-\frac{2}{3}= \pm \frac{1}{3}[/tex]
And the solutions for y are:
[tex] y_1 = \frac{1}{3} +\frac{2}{3}=1[/tex]
[tex] y_1 = -\frac{1}{3} +\frac{2}{3}=\frac{1}{3}[/tex]
Part ii
We can use the quadratic formula:
[tex] y =\frac{-b \pm \sqrt{b^2 -4ac}}{2a}[/tex]
And with [tex] a = 3, b=-4 and c =1[/tex] we got:
[tex] y =\frac{4 \pm \sqrt{(-4)^2 -4(3)(1)}}{2*3}[/tex]
And we got:
[tex] y_1 = 1 , y_2 =\frac{1}{3}[/tex]
What is the domain of the function Begin equation . . . y equals . . . the square root of the quantity x minus ten . . . end equation?
Answer:
Domain: [10, ∞)
Step-by-step explanation:
Domain is the set of x-values that can be inputted into function f(x).
Step 1: Write equation
f(x) = √(x - 10)
We know that if we get negatives under the square root, we would get imaginary numbers.
Our domain to include all x-values would have to be bigger than 10:
f(10) = √(10 - 10) = √0 = 0
If the number is smaller than 10, we get: f(9) = √(9 - 10) = √-1 = i
Therefore, our real numbers domain would be [10, ∞) or x ≥ 10.
Mrs. DeMarco wants to estimate the length of her porch so she knows how much paint to buy. What is the best benchmark for her to use? *
Answer:
Without any multiple choice options i would have to guess square feet.
Step-by-step explanation:
Find the volume of a come with the radius of 80 and the height of 21. Please show step by step
Answer:
= 140800 cubic (ft/meters/yards/cm/inches)
Step-by-step explanation:
For Cone
radius (r) = 80
height (h) = 21
Volume Of Cone
= π r² h/3
= 22/7 x 80 x 80 x 21/3
= 22 x 80 x 80
= 22 x 6400
= 11 x 12800
= 140800 cubic (ft/meters/yards/cm/inches)
Is the sequence arithmetic? (Yes or no) If yes, please also give its common difference. 14) -2.8, -2.2, -1.6, -1.0
Answer:
Yes
The common difference is .6
Step-by-step explanation:
Take the second term and subtract the first term
-2.2 - (-2.8)
-2.2+ 2.8 = .6
Take the third term and subtract the second
-1.6 - (-2.2)
1.6 +2.2
The common difference is .6
Answer:
Yes
Step-by-step explanation:
-2.8, -2.2, -1.6, -1.0
-2.2-(-2.8)= -1.6 - (-2.2)= -1 - (-1.6)= 0.6
This is AP with first term -2.8 and common difference 0.6
PLEASE HELP ME!!! f(x) = x2. What is g(x)?
Answer:
g(x)=3x^2
Step-by-step explanation:
The marked price of a water cooler is $ 500. The shopkeeper offers an off-season discount of 15% on it. Find the discount.
Answer:
75 dollars
Step-by-step explanation:
You know that 500=100%, so we can set up the following
15%(500/100%) = 75
so the discount 75 dollars
A bacteria population is initially 320. After 45 minutes, they've grown in number to 700. What is the doubling time for this population? Round to the nearest second. answer choices 39 minutes 41 seconds 39 minutes 31 seconds 39 minutes 21 seconds 39 minutes 51 seconds
Answer: 39 minutes 51 seconds
Step-by-step explanation:
Nt=N0 * 2^n
N0=Initial population
n=number of times bacteria divide
700=320*2^n
log2(700/320)=1.129283017=n
45/1.129283017=39.84829252 minutes
0.84829252*60=50.89755135≈51seconds
so the answer is
39minutes and 51seconds
Tammy rents a storage shed. The storage shed is in the shape of a rectangular prism with measurements
as shown
9 feet
9 feet
10 feet
Select the phrase and number from the drop-down menus to correctly complete each sentence
Tammy can find the volume of the storage unit by
Choose
To completely fill the storage shed, Tammy would need
choose
unit boxes that each
measure 1 cubic foot
9514 1404 393
Answer:
B, D
Step-by-step explanation:
The volume is the product of the dimensions. For dimensions 9 ft, 9 ft, 10 ft, the volume is found by multiplying (9 ft) × (9 ft) × (10 ft) = 810 ft³.
To fill the volume with boxes of volume 1 ft³ would require 810 boxes.
Find the point on the curve r(t) = (5Sint)i + (5Cost)j +12tk
at a distance 26pi units along the curve from the point (0,5,0) inthe direction of increasing arc length.
Answer:
Find the point on the curve r(t) = (5Sint)i + (5Cost)j +12tk
at a distance 26pi units along the curve from the point (0,5,0) inthe direction of increasing arc length.
(My attempt):
T comes to be 2pi and when the integral is done and solved to givea value of 26pi and the position comes to be (0,5,24pi). However,this calculation and answer though correct (according to the backof the book) does not involve the use of the fact that at time t=0,the particle is at (0,5,0).
What for is that information given then?
Step-by-step explanation:
Consider the curve r(t) = (5Sint)i + (5Cost)j + (12t)k
Need to find the point on the given curve at a distance 26π unit along the curve from the point (0,5,0) inthe direction of increasing arc length.
Length of a smooth curve is [tex]r(t)=x(t)i+y(t)j+z(t)k, \ \ a\leq t\leq b[/tex] that is traced exactly once as t increase from t = a to t = b, is
[tex]L=\int\limits^b_a \sqrt{(\frac{dx}{dt} )^2+(\frac{dy}{dt} )^2+(\frac{dz}{dt} )^2dt}[/tex]
For the given curve
x(t) = 5 sin t
y(t) = 5 cos t
z(t) = 12t
When t = 0
x(0) = 5 sin 0
= 0
y(0) = 5 cos 0
= 0
z(0) = 12(0)
=0
So, the point (0, 5, 0) corresponds to t = 0
So let t = t₀ correspond to any point (x, y, z) on the curve at a distance of 26pi units from the point t = 0 along the increasing arc length
So, the length of curve from the point t = 0 to t = t₀ is L = 26pi units
Substitute the known value to the arc length formula
[tex]L=\int\limits^b_a \sqrt{(\frac{dx}{dt} )^2+(\frac{dy}{dt} )^2+(\frac{dz}{dt} )^2dt}[/tex]
[tex]26\pi=\int\limits^{t_0}\sqrt{(5 \cos t)6+(-5 \sin t)^2+(12)^2dt}\\\\26\pi=\int\limits^{t_0}_0\sqrt{25 \cos ^2t+25 \sin ^2t+144dt} \\\\26\pi=\int\limits^{t_0}_0 \sqrt{25(\cos^2t+ \sin^2t)+144dt}\\\\26\pi=\int\limits^{t_0}_0\sqrt{25(1)+144dt} \\\\26\pi= \int\limits^{t_0}_0\sqrt{169dt} \\\\26\pi= \int\limits^{t_0}_013 dt\\\\26\pi=13\int\limits^{t_0}_0dt\\\\26\pi=13[t]^{t_0}_0\\\\26\pi=13[t_0-0]\\\\26\pi=13t_0\\\\t_0=\frac{26\pi}{13} \\\\t_0=2\pi[/tex]
The point corresponding to [tex]t_0 = 2\pi[/tex]
when t = 0
[tex]x(2\pi)=5 \sin (2\pi)\\\\=0\\\\y(2\pi)=5 \cos (2\pi)\\\\=5(1)=5\\\\z(2\pi)=12(2\pi)\\\\=24\pi[/tex]
Therefore the point corresponding to [tex]t_0 = 2\pi[/tex] is [tex](0,5,24\pi)[/tex]
Hence, the required point on the given curve at distance 26\pi units along the curve from the point (0,5,0) in the direction of increasing arc length is [tex](0,5,24\pi)[/tex]
At a school fair, each student spins the spinner, which is equally likely to land on each of the four sectors. The spinner shows how many tokens the student wins or loses. What is the expected number of tokens that a student will win on each spin
Answer:
3 tokens.
Step-by-step explanation:
We need the roulette image, therefore we will suppose one that I will leave as an attached image:
The main thing to keep in mind in this case is that the probabilities are the same, therefore you don't have to take that into account, just operate with the values of each sector, therefore the expected value would be:
expected value = profit - loss
expected value = (5 + 5) - (4 + 3)
expected value = 10 - 7 = 3
This means that the number of tokens waiting for the student to earn for each spin is 3 tokens.
how does one convert meters to hectares?
Step-by-step explanation:
Meters measures length, hectares measures area.
1 hectare = 10,000 m²
Answer Meters measures length, hectares measures area.
1 hectare = 10,000 m²
Step-by-step explanation:
1. A random sample of 64 customers at a drive-through bank window is observed, and it is found that the teller spends an average of 2.8 minutes with each customer, with a standard deviation of 1.2 minutes. Is there sufficient evidence to conclude that the teller spends less than 3 minutes with each customer slader
Answer:
[tex]t=\frac{2.8-3}{\frac{1.2}{\sqrt{64}}}=-1.33[/tex]
The degrees of freedom are given by:
[tex]df=n-1=64-1=63[/tex]
The p value for this case would be given by:
[tex]p_v =P(t_{63}<-1.33)=0.0942[/tex]
If we use a significance level lower than 9% we have enough evidence to FAIL to reject the null hypothesis that the true mean is greater or equal than 3 but if we use a significance level higher than 9% the conclusion is oppossite we reject the null hypothesis
Step-by-step explanation:
Information given
[tex]\bar X=2.8[/tex] represent the sample mean
[tex]s=1.2[/tex] represent the standard deviation
[tex]n=64[/tex] sample size
[tex]\mu_o =3[/tex] represent the value to verify
[tex]\alpha[/tex] represent the significance level
t would represent the statistic (variable of interest)
[tex]p_v[/tex] represent the p value
Hypothesis to verify
We want to check if the true mean for this case is less than 3 minutes, the system of hypothesis would be:
Null hypothesis:[tex]\mu \geq 3[/tex]
Alternative hypothesis:[tex]\mu < 3[/tex]
The statistic for this case is given by:
[tex]t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}[/tex] (1)
Replacing we got:
[tex]t=\frac{2.8-3}{\frac{1.2}{\sqrt{64}}}=-1.33[/tex]
The degrees of freedom are given by:
[tex]df=n-1=64-1=63[/tex]
The p value for this case would be given by:
[tex]p_v =P(t_{63}<-1.33)=0.0942[/tex]
If we use a significance level lower than 9% we have enough evidence to FAIL to reject the null hypothesis that the true mean is greater or equal than 3 but if we use a significance level higher than 9% the conclusion is oppossite we reject the null hypothesis
Construct an equation that has n = 8 as its solution. Use n on both sides of the equation
Answer:
8n-25=15+3n
Step-by-step explanation:
We can do this by working backwards and making suitable substitutions.
If n=8
Multiply both sides of the equation by 5
5n=8*5
5n=40
Now, we can rewrite the two sides of the equation as follows
5n=8n-3n40=25+15Thus:
5n=40 is equivalent to:
8n-3n=25+15
Add 3n to both sides
8n-3n+3n=25+15+3n
8n=25+15+3n
Subtract 25 from both sides
8n-25=25-25+15+3n
We have:
8n-25=15+3n
Solving this equation will have a solution of n=8.
ASAP! GIVING BRAINLIEST! Please read the question THEN answer CORRECTLY! NO guessing. I say no guessing because people usually guess on my questions.
Answer:
B. -4<x<2
Step-by-step explanation:
The highest x point is -4 and lowest peak is 2
Answer:
B. -4 ≤ x ≤ 2
Step-by-step explanation:
→Basically, the question is asking, "At what point is the line on the graph decreasing?"
→Looking at the graph, you can see that when x = -4, that's when the line on the graph starts to decrease. The line continues to decrease, until it reaches the point where x = 2.
This makes the correct answer "B. -4 ≤ x ≤ 2."