Answer:
May I ask what error are we talking ab?
Step-by-step explanation:
A decision maker is interested in estimating the mean of a population based on a random sample. She wants the confidence level to be % and the margin of error to be . She does not know what the population standard deviation is, so she has selected the pilot sample below. Based on this pilot sample, how many more items must be sampled so that the decision maker can make the desired confidence interval estimate? The decision maker should sample nothing more items to make the desired confidence interval estimate.
Complete Question
The complete question is shown on the first uploaded image
Answer:
The value is [tex]n = 146093[/tex]
Step-by-step explanation:
From the question we are told that
The margin of error is [tex]E = 0.04[/tex]
The data is
8.70 4.79 10.95 15.19 14.06
16.99 1.22 9.02 14.39 5.73
7.28 3.22 2.66 6.13 6.93
Generally the sample mean is mathematically represented as
[tex]\= x = \frac{\sum x_i}{n}[/tex]
=> [tex]\= x = \frac{ 8.70 + 4.79 +\cdots + 6.93}{15}[/tex]
=> [tex]\= x = 8.48[/tex]
Generally the standard deviation is mathematically represented as
[tex]\sigma = \sqrt{ \frac{ \sum (x_i - \= x)}{n} }[/tex]
=> [tex]\sigma = \sqrt{ \frac{ (8.70 - 8.48 )^2 + ( 8.70 - 8.48)^2 + \cdots + (6.93 - 8.48)^2 }{15} }[/tex]
=> [tex]\sigma = 5.14[/tex]
From the question we are told the confidence level is 98% , hence the level of significance is
[tex]\alpha = (100 - 98 ) \%[/tex]
=> [tex]\alpha = 0.02[/tex]
Generally the degree of freedom is mathematically represented as
[tex]df = n -1[/tex]
=> [tex]df = 15 -1[/tex]
=> [tex]df = 14[/tex]
Generally from the t distribution table the critical value of at a degree of freedom of is
[tex]t_{\frac{\alpha }{2} , 14 } = 2.9768 [/tex]
Generally the sample size is mathematically represented as
[tex]n =[ \frac{t_{\frac{\alpha }{2} , 14 } * \sigma }{E} ]^2[/tex]
=> [tex]n =[ \frac{ 2.9768 * 5.136 }{0.04} ]^2[/tex]
=> [tex]n = 146093[/tex]
NEED HELP WITH MATH! Will Give brainliest!
Answer:
3
Step-by-step explanation:
-1, 1, 2
Kyle sells 20 boxes of fruit for a fundraiser.Omar sells 2 times as many boxes of fruit as Kyle sells.what is the total number of boxes that Kyle and Omar sell?
Answer:
60 boxes
Step-by-step explanation:
Kyle + (Kyle x 2)
20 + (20 x 2)
20 + 40
60
I need help again . ASAP I don’t this lesson at all
Answer:
c = 33°, b = 147°
Step-by-step explanation:
You can just find that c + 147° makes a straight line (which is 180°) so c = 180° - 147°. You can do the same thing for b.
given t(m)=7-9m, find t(m)=-2
Answer:
m=1
Step-by-step explanation:
-2=7-9m so -9=-9m so m=1
Which equation has no solution?
-(85 + 6) – 23 = -3(25 + 1)
O -4(35 + 2) = -23 – 8 + 45
o 745 + 2) – 31 = (63 + 3)
0-25 +5 – 35 + 12 = -5(1 - 3) + 2
Answer:
Third choice 7(x + 2) - 3x = 2/3(6x + 3)
Step-by-step explanation:
Choice answer 1 has infinitely many solutions since -1/2(8x + 6) - 2x = -3(2x + 1) → -6x - 3 = -6x - 3 = 0 → 0 = 0 [is always equal to].
Choice answer 2 has one solution since
-1/2(8x + 6) - 2x = -3(2x + 1) → -2x - 8 = 2x - 8 → x = 0 [is equal to in 1 condition].
Choice answer 3 has no solution since
7(x + 2) - 3x = 2/3(6x + 3) → 4x + 14 = 4x + 2 → 0 = -12 [is never equal to].
Choice answer 4 has infinitely many solutions since -2x + 5 - 3x + 12 = -5(x - 3) + 2 → -5x + 17 = -5x + 17 → 0 = 0 [is always equal to].
By Tuesday, Connie fed her cat 12 ounces of cat food. Based upon her ratio, how much dog food would Connie have fed her dog? Explain how you found your answer using both the table and the graph.
What is the interest is the principal is $10,000 the interest rate is 2% and the time is eight years
Answer:
the answer is 160
Step-by-step explanation:
take the interest percentage and divide by 100 ex:5.2%100=0.052
take the dollar amount and multiply interest decimal
ex:$450*0.052=23.40
take the sum of dollar amount and interest decimal and multiply by # of years of interest
ex:3 years *23.40=70.20
and that is how i got that answer
Put these fractions in order of size, smallest to largest 2/3, 3/5, 7/10
Answer:
2/3, 3/5, 7/10
Step-by-step explanation:
hope that helped
3x^2+ 5x − 2 = 0 solve
SHOW ALL WORK AND STEPS FOR BRAINLIEST
9514 1404 393
Answer:
x = -2 and x = 1/3
Step-by-step explanation:
The simple way to solve this is to enter the equation into a graphing calculator and have it show you what the zeros are.
The solutions are x = -2 and x = 1/3.
__
One way to solve this is to factor it. The product of the leading coefficient and the constant is (3)(-2) = -6. You want to find factors of this number that have a sum equal to the coefficient of the linear term: 5.
-6 = (-1)(6) = (-2)(3) = ...
The first pair of factors listed here has a sum of 5, so we can rewrite the equation as ...
3x^2 -x +6x -2 = 0
Factoring pairs of terms, we have ...
x(3x -1) +2(3x -1) = 0
(x +2)(3x -1) = 0
The solutions are the values of x that make these factors zero:
x + 2 = 0 ⇒ x = -2
3x -1 = 0 ⇒ x = 1/3
The solutions are x = -2 and x = 1/3.
Enter the number of complex zeros for the polynomial function in the box.
f(x)=x4+5x2+6
Answer:
4Step-by-step explanation:
Given function
f(x)=x⁴+5x²+6Zeros of the function:
x⁴+5x²+6 = 0(x²)² + 2x² + 3x² + 6= 0(x² + 2)(x² + 3) = 01. x²+ 2 = 0
x²= -2x₁,₂ = ±√2i2. x² + 3 = 0
x² = -3x₃,₄ = ±√3iAs we see there are 4 complex zeros
Answer:
4
Step-by-step explanation:
Question 2 (10 points) What is the y-intercept of this graph? $100 0 $200 $50
Answer:
100 A
Step-by-step explanation:
PLEASE HELP QUICK!!!!What is the greatest common factor of 40, 10, and 20?
Answer:
40? it could go on for infinite mate
Step-by-step explanation:
Answer:
10
Step-by-step explanation:
10 goes into 40 and 20 as the greatest common factor.
Hope this helps and pls do mark me brainliest if you can:)
The Empirical Rule states that for bell-shaped distributions, about 68% of the values fall within 1 standard deviation of the mean. The heights of women at a large university are approximately bell-shaped, with a mean of 66 inches and standard deviation of 3 inches. Use this information to answer the questions. (a) What is the probability that a randomly selected woman from this university is 69 inches or taller
Answer: 0.16
Step-by-step explanation:
Let X be a random variable that represents the heights of women at a large university are approximately bell-shaped, with a mean of 66 inches and standard deviation of 3 inches.
According to the Empirical Rule, for bell-shaped distributions, about 68% of the values fall within 1 standard deviation of the mean.
About 68% woman have height between ( 66-3) inches and (66+3) inches.
i.e. About 68% woman have height between 63 inches and 69 inches.
The percentage of woman have height either less than 69 inches or greater than 69 inches =100% - 68%= 32% [both share equal area on curve.]
The percentage of woman have height is 69 inches or taller = 32%÷2
= 16%
Hence, the probability that a randomly selected woman from this university is 69 inches or taller =16%=0.16
The area of a square is 36 square centimeters. What is the length of each side of the square?
Answer:
dived by 2
Step-by-step explanation:
it showed give your anserw if not im sorry
The length of each side of the square is, 6 centimeter.
What is mean by Rectangle?A rectangle is a two dimension figure with 4 sides, 4 corners and 4 right angles. The opposite sides of the rectangle are equal and parallel to each other.
We have to given that;
The area of a square is 36 square centimeters.
Now, We know that;
⇒ Area of square = Side²
Let the side of square = x
Hence, We can formulate;
⇒ x² = 36
⇒ x = √ 36
⇒ x = 6 centimeters
Learn more about the rectangle visit:
https://brainly.com/question/2607596
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Identify the slope and y-intercept of the following equation.
28-29 plz and thank you I really don’t knoe
Answer:
28 false 29 yes
Step-by-step explanation:
cuz im different
What is 6/15 written as a decimal?
A. 0.4
B. 0.6
C. 2.0
D. 2.5
Answer:
the answer is A "0.4"
Step-by-step explanation:
Answer:
0.4
Step-by-step explanation:
just divide 6 by 15 and then it will give u the answer.
i don’t know how to figure this out please help me
Answer:
Reverse
Step-by-step explanation:
Do the whole thing backwards in sentence
Start with y
Multiply by 7
Add 14
Take the square root
You end the number y.
6. What is the area of a square with a side length of 7 + 2i ?
A. 25 + 28i
B. 45 + 28i
C. 45 - 14
D. 49 + 281
Answer:
B
Step-by-step explanation:
help me please is of maths
here is the photo
Answer:
you're right
Step-by-step explanation:
it's telling me to add more characters so thus is what you get
Sal's Pizza uses 720 pounds of flour i 4 weeks. Sal's is open 6 days a week and uses the same amount of flour each day. How much flower does Sal's Pizza use in 1 day?
Answer:
sal's pizza uses 30 pounds of flour in 1day
Step-by-step explanation:
Answer:
LET THE PIZZA BURN LIKE I DID
Step-by-step explanation:
[4G-07] Three individuals are completing a given task. The completion time for each individual is exponential random variable with mean 7, and is independent of one another. Find the probability that the first person to complete the task will do so in less than 5 minutes. (Use 4 decimals)
Answer:
P(X≤5) = 0.5105 (Approx)
Step-by-step explanation:
Assume, x = completion time of given task
Mean u = 7
So,
λ = 1/u = 1/7
So,
x ↔ exp(λ)
f(x) = P(X≤x) = [tex]1-e^{-\frac{1}{u}x }[/tex]
P(X≤5) = [tex]1-e^{-\frac{1}{7}5 }[/tex]
P(X≤5) = 0.5105 (Approx)
Select the correct answer from the drop-down menu. Triangle ABC is similar to Triangle DEF. The perimeter of Triangle ABC is five times the perimeter of Triangle DEF. The area of. Triangle ABC is 100 square centimeters. The area of DEF is how many square centimeters.
Answer:
20
Step-by-step explanation:
Answer:
the first one
Step-by-step explanation:
Find the absolute value
| -5.2 |
Answer:
5.2 is the answer because i know
Step-by-step explanation:
make me brainiest
evalute: 7.48 + (-8.245)
Answer:
7.48−8.245
=7.48+−8.245
=−0.765
Answer:
-0.765
Step-by-step explanation:
Simplify: 7.48 + (-8.245) = 7.48 - 8.2457.48 - 8.245 = -0.765I hope this helps!
write an expression to represent the given statement. use n for the variable. three times the absolute value of the sum of a number and 6
Answer:
3/n+6/
Step-by-step explanation:
-7g+3g²-31-4g-9g²
Combine like terms to simplify
Answer:
6g^2−11g−31
Step-by-step explanation:
If this helps may i plz have brainliest :)
Help please answer correctly
As a restaurant manager, you are tracking the number of ketchup bottles used each week in the restaurant. For six
weeks, the number of bottles used each week were 10, 14, 11, 10, 18, and 17.
What is the mean number of ketchup bottles used in one week?
A. 8
B. 10 C. 35/3
D. 40/3
E. 14
Answer:
The mean is 40/3 ⇒ D
Step-by-step explanation:
The mean of a set of data = The sum of data ÷ the number of data
∵ A restaurant manager tracking the number of ketchup bottles in
six weeks
∴ The number of data = 6
∵ The numbers of ketchup bottles used each week are 10, 14, 11, 10, 18, 17
→ Find their sum
∴ Their sum = 10 + 14 + 11 + 10 + 18 + 17
∴ Their sum = 80
∵ The mean = The sum of data ÷ the number of data
∴ The mean = 80 ÷ 6
→ Simplify it by dividing both by 2
∴ The mean = 40/3