Answer:
We know that at CI of 90% the new study provide evidence to claim that the porcentage of multigenerational households has not change
Step-by-step explanation:
To use Normal Distribution as an approximation of the binomial distribution
and develop a test of proportion we look at the products:
n*p and n*q in the sample
p = 28/580 p = 0,04827 then q = 0,95173
and n*p = 580*0,04827 = 27,99 > 5
n*q = 580*0,95173 = 552 > 5
Hypothesis Test:
p₀ = 4 % p₀ = 0,04
sample size n = 580
p sample proportion mean p = 0,04
Chossing a confidence Interval CI = 90 % then α = 10% α = 0,1
α/2 = 0,05 and z(score) = 1,64 z (c) = 1,64
The test is a doble tail test since the question is about difference between the study and the past census
Null Hypothesis H₀ p = p₀
Alternative Hypothesis Hₐ p ≠ p₀
To calculate z(statistics) z(s)
z(s) = ( p - p₀ ) / √ p*q/n
z(s) = ( 0,04827 - 0,04 ) * √580 / √0,04827*0,95173
z(s) = 0,00827*24,08/ √0,04594
z(s) = 0,1991/ 0,2143
z(s) = 0,929
Comparing z(s) and z(c)
z(s) < z(c) ; 0,929 < 1,64
Therefore at CI 90% we accept H₀ since z(s) is in the acceptance region
Maria rides her bicycle a distance,d, of 40 meters. If her riding time,t, is 10 seconds, what is her rate of speed, r, in meters per second?
A. 1/400
B. 1/4
C. 4
B. 400
Answer: C
Step-by-step explanation:
i had this question and got t right with C
The Probability distribution table shows the proportion of people living in five different regions of a city. What is the probability that a person chosen at random, who lives in the city, lives in the central or north region.
The probability that a person chosen at random, who lives in the city, lives in the central or north region is 0.56
What is the probability?A probability is a number that reflects the chance or likelihood that a particular event will occur.
Given that, the Probability distribution table shows the proportion of people living in five different regions of a city
Probability = Favourable Outcomes/Total Outcomes
Probability(of selecting a person from central or north region) = 0.44 + 0.12 = 0.56
Hence, probability that a person chosen at random, who lives in the city, lives in the central or north region is 0.56
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40% of the students at Wilson
Middle School said they would go
trick-or-treating this year. If 300
students said they were going to
trick-or-treat, how many students
attend the school?
A) 750
B) 120
C) 850
N 75
Answer:
A
Step-by-step explanation:
40% of 750 is 300 you can confirm this because 75 is 10% of 750 and 75 * 4 = 300.
Suppose there are 15 freshman, 16 sophomores, 10 juniors, and 12 seniors running for the offices of president, vice president, and secretary. If no person can hold more than one office, in how many different ways could these people be elected to these positions
Answer:
Number of ways = 140,556
Step-by-step explanation:
Total person = 15 + 16 + 10 + 12
Total person = 53
Number of not included bperson = 3
Computation:
Number of ways = !53 / !(53-3)
Number of ways = 53 x 52 x 51
Number of ways = 140,556
Ron is planning for the back-to-school rush at his store. Notebooks are sold in boxes of 42. Last year he estimated that he would sell 168 notebooks, but he sold 200 notebooks. How much was Ron’s error?
Answer:
-32
Step-by-step explanation:
Answer:
can i get the answer options?
Step-by-step explanation:
What type of angle is a 9 degree angle?
Answer:
An acute angle
Is there any answer choices??
b is (4,-10) and c is (10,-4) what is the length of bc ? Explain with full detail ! Pls
Answer:
m=1
Step-by-step explanation:
y=mx+b
m = y 2 − y 1/ x2 − x 1
m = − 4 − ( − 10 )/ 10 − ( 4 )
m = − 2 − 5 ⋅ − 1/ − 1 (− 5 + 2 )
m = 3 − 1 /( − 5 + 2 )
Add
− 5 and 2
m = 3/ − 1 ⋅ − 3
Multiply
− 1 by − 3
m = 3/ 3
Divide 3 by 3 .
m = 1
Hope this helps!
PLZZ HELP!Will mark brainliest
What graph represents the piecewise-defined function?
y={6 if x≤-3 3 if -3
Answer:
Step-by-step explanation:
wheres the graph
Answer:
we cant see graph...
Step-by-step explanation:
so we cant give u an answer so sorry...
136 cars were sold during the month of April. 71 had air conditioning and 72 had automatic transmission. 55 had air conditioning only, 56 had automatic transmission only, and 9 had neither of these extras. What is the probability that a randomly selected car had automatic transmission or air conditioning or both
Answer:
0.93382
Step-by-step explanation:
Let
The event where a car has air conditioning (ac) be A
The event where a car has an automatic transmission be B
[tex]P(\text{Car has ac and cars that don't have automatic transmission})=P(A\cap B')=\dfrac{71}{136}[/tex]
[tex]P(\text{Car has car has an automatic transmission and no ac})=P(B\cap A')=\dfrac{56}{136}[/tex]
[tex]P(\text{Car has no ac and cars that don't have automatic transmission})=P(A'\cap B')=\dfrac{9}{136}[/tex]
The probability of a chosen car which has ac or automatic transmission or both
[tex]P(A\cup B)=1-P(A\cup B)'\\\Rightarrow P(A\cup B)=1-P(A'\cap B')\\\Rightarrow P(A\cup B)=1-\dfrac{9}{136}\\\Rightarrow P(A\cup B)=0.93382[/tex]
The probability that a randomly selected car had automatic transmission or air conditioning or both is 0.93382
In City A, the temperature rises F from 8 A.M. to 9 A.M. Then the temperature drops F from 9 A.M. to 10 A.M. In City B, the temperature drops F from 8 A.M. to 9 A.M. Then the temperature drops F from 9 A.M. to 10 A.M. Write an expression that represents the change in temperature from 8 A.M. to 10 A.M. for each city. Simplify and interpret each sum. Use pencil and paper. Which city has the greater change in temperature? Which expression represents the change in temperature for City A?
Here is the full question.
In city A, the temperature rises 9° F from A.M to 9 A.M. Then the temperature drops 8°F from 9 A.M. to 10 A.M. in city B, the temperature drops 1°F from 8 A.M. to 9 A.M. Then the temperature drops 3°F from 9 A.M. to 10 A.M.
Write an expression that represents the change In temperature from 8 A.M. to 10 A.M for each city. Simplify and interpret each sum. Use a pencil and paper. Which expression represents the change in temperature for city A?
Answer:
In City A, the expression for the change in temperature is = 9 + (-8)
The amount the temperature changes for City A = 1°F
In City B, the expression for the change in temperature is -1 + (-3)
The amount the temperature changes for City B = -4°F
Thus, City A has a greater change in temperature.
Step-by-step explanation:
From the information above; Given that:
In City A, the rise in temperature from 8 A.M to 9 A.M is = 9°F
In City A, the drop in temperature from 9 A.M to 10 A.M = 8°F
Similarly;
In City B, the drop in temperature from 8 A.M to 9 A.M = 1°F
In City B, the drop in temperature from 9 A.M to 10 A.M = 3°F
∴
For City A
The temperature change from 8 A.M to 10 A.M are :
8 A.M to 9 A.M = +9°F
9 A.M to 10 A.M = -8°F
In conclusion, The sum for the change from 8 A.M to 10 A.M = 9 + (-8) = 1°F
For City B
The temperature change from 8 A.M to 10 A.M are:
8 A.M to 9 A.M = -1°F
9 A.M to 10 A.M = -3°F
In conclusion, The sum for the change from 8 A.M to 10 A.M = -1 + (-3) = -4°F
help me pleaseeeeeeeee
Answer:
B, C and E
Step-by-step explanation:
(5x+6)/2=3-(4x+12)
(5x+6)/2=-4x-9
5/2x+3=3-(4x+12)
5x+6=-8x-18
Whats the answer ill give brainliest for best explained answer
Answer:
Hello!!! Princess Sakura here ^^
Step-by-step explanation:
The answer is choice C it's the only one that actually touches point (0, -7) and increases after that point.
Graph 1:
If we take a look at graph 1 we see that it does cross the y-axis at (0,-7), but sadly it doesn't increase.
Graph 2:
If we take a look at graph 2 we see that it does cross over y-axis but not at (0,-7). It also doesn't increase but that doesn't matter anymore.
Graph 3:
If we take a look at graph 3 we see that it crosses the y-axis at (0,-7) and it also increases. Although it decreases before it doesn't matter, it only has to increases after it hits (0,-7).
A certain brand of TV has a 50% chance of being defective. Which model could be used to determine the probability that when two TVs are chosen, they will both be defective? Roll a die four times Flip a coin twice Flip a coin four times None of the above
Answer:
The answer is "Flip a coin twice".
Step-by-step explanation:
The probability, that its damage would be (HH, TT, HT, TH) if two of the TVs were selected, that's why the answer is "Flip a coin twice" is the correct.
I need help asap can anyone help
Answer:
c = 15x + 10 or 15x + 10 = c
Step-by-step explanation:
15x (number of t-shirts) plus the shipping fee
which statement about a right triangle is true?
a b c or d?
(See Image)
Answer:
B
Step-by-step explanation:
You solve for the length of a side of a triangle using the pythagorean theorem, which states that a^2 + b^2 = c^2.
To buy a car Tom borrows $14,000 at 11% compound interest calculated monthly for 5 years. Find the total amount to be paid back (round to the nearest cent).
Answer:21,700
Step-by-step explanation:
Please answer will make brainiest
What is the first step in solving 5 1/2 = 2 2/7 + n/4?
add 2 2/7 to both sides of the equation
subtract 2 2/7 from both sides of the equation
multiply both sides of the equation by 4
divide both sides of the equation by 4
Answer
The 3rd option "subtract 2 2/7 from both sides"
Step-by-step explanation:
Answer this please I'll give brainliest to the correct answer
I can be sweet or not so much, I have nice curves and from my name you might think I make a ringing sound. What am I?
Answer:
bell? or belle from beauty and the beast?
Step-by-step explanation:
Jules owns a square plot of land that measures 30
yards on each side. He plans to divide the land in half
by building a fence, as shown by the dotted line below.
How many yards of fencing will Jules need?
O 15 yd
O 30 yd
O 3073 yd
D
30 yd
O 303 yd
Mark this and return
Save and Exit
Next
Answer:
Jules would need 30 yards of fencing.
The yards of fencing that would be needed is 30√2 yards.
What is the length of the square?
In order to determine the length of the fence, the Pythagoras theorem would be used.
The Pythagoras theorem: a² + b² = c²
where:
a = length
b = base
c = hypotenuse
30² + 30²
= 900 + 900
= √1800
= 30√2 yards
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Blueberries cost $1.99 per pound. For a recipe, Rayann needs 5.5 pounds of blueberries.
Answer:
It would cost the much $10.94500 for it all.
Step-by-step explanation:
Are the ratios equivalent? Explain
Answer:
How am I supposed to answer that with no picture or answers? :s
Step-by-step explanation:
I neeed help !!!!! :( someone help mee
Explanation:
If y is the short leg of the 30-60-90 triangle, then y*sqrt(3) is the length of the longer leg. The short leg is always opposite the shortest angle.
We're given that 5*sqrt(3) is the longer leg, so
y*sqrt(3) = 5*sqrt(3)
y = 5
After we divide both sides by sqrt(3)
Side note: x = 2y = 2*5 = 10.
[tex] \LARGE{ \underline{ \pink{ \sf{Required \: answer:}}}}[/tex]
Heya mate!
If you observe the figure, the longest side always resides the opposite place of the right angle. Accordingly the perpendicular is 5√3 units in measure.
With this, the hypotenuse is x and the base is y. We need to find y. By doing some smart work! Let's guess the trigonometric ratio that we give us the relation between y and 5√3 because one of the angle given is 60°
⇛ tan a = Perpendicular / Base
Plugging the values of a, and Perpendicular to find the base of the triangle i.e. y.
⇛ tan 60° = 5√3 / y
⇛ √3 = 5√3 / y
⇛ y = 5√3 / √3
⇛ y = 5 units
Hence, the Correct Option is Option A.
Among students in the sixth grade: 54% are girls.23 are boys.How many students are in the sixth grade?
Answer:
There are 50 Students.
Step-by-step explanation:
I did:
100 - 54 = 46
46 ÷ 23 = 2
2 students = 1%
54 ÷ 2 = 27
23 boys + 27 girls = 50 students
pls help meh i don’t have time
Which expression DOES NOT represent a square root of a perfect square integer?
A)
V100
B)
V64
C)
V81
D)
189
what is the Y intercept
y= 4x - 9
Answer:
b = –9
Step-by-step explanation:
First, refer to the slope-intercept formula:
y = mx + b
In this formula, m is the slope and b is the y-intercept.
That means in y = 4x – 9, the b variable is –9, which is the y-intercept.
Answer: the answer is A. because the y intercept is -9.
6. What data are represented by the stem-and-leaf plot below? A stem and leaf plot is shown.To the left of a vertical line are the numbers 1, 2, 3, and 4. · On the same row as the number 1 but on the right side of the vertical line are the numbers 3, 4, and 6. · On the same row as the number 2 but on the right side of the vertical line are the numbers 1, 2, 8, and 9. · On the same row as the number 3 but on the right side of the vertical line are the numbers 0, 2, 4, and 4. · On the same row as the number 4 but on the right side of the vertical line is the number 5. A key identifies that 1 vertical line 3 means 13. (1 point) 13, 14, 16, 11, 12, 38, 39, 30, 32, 34, 34, 35 13, 24, 36, 11, 22, 38, 49, 10, 22, 34, 44, 45 31, 41, 61, 12, 22, 82, 92, 3, 23, 43, 43, 54 13, 14, 16, 21, 22, 28, 29, 30, 32, 34, 34, 45
Answer:
the answer is D i will soon do all of the questions
Step-by-step explanation:
the reason its d is because all of the answers beside D do not match the leaf and steam picture but yea
slope=4/5 passing though (5,3) whats the point slope form
slope intercept form
Answer:
4
Step-by-step explanation:
The slope-intercept form of the equation is y = (4/5)x -1.
What is an equation of the line?An equation of the line is defined as a linear equation having a degree of one. The equation of the line contains two variables x and y. And the third parameter is the slope of the line which represents the elevation of the line.
The general form of the equation of the line:-
y = mx + c
m = slope
c = y-intercept
Slope = ( y₂ - y₁ ) / ( x₂ - x₁ )
Given that slope=4/5 passing through (5,3). The equation of the line can be written as,
y = mx + c
3 = ( 4 x 5/5) + c
c =-1
The equation will be:-
y = mx + c
y = (4/5)x -1
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Can someone please help, ty!!
(Will mark brainliest)
Answer:
I think the blue one
Step-by-step explanation:
A new one-year membership at RecPlex costs $160. A registration fee of $28 is paid up
front, and the rest is paid monthly. How much do new members pay each month
Answer:
160 x 28
Step-by-step explanation: