In 2011, a U.S. Census report determined that 71% of college students work. A researcher thinks this percentage has changed since then. A survey of 110 college students reported that 91 of them work. Is there evidence to support the reasearcher's claim at the 1% significance level? A normal probability plot indicates that the population is normally distributed.

Answers

Answer 1

Answer:

Note: The full question is attached as picture below

a) Hо : p = 0.71

Ha : p ≠ 0.71

p = x / n

p = 91/110

p = 0.83.

1 - Pо = 1 - 0.71 = 0.29.

b) Test statistic = z

= p - Pо / [√Pо * (1 - Pо ) / n]

= 0.83 - 0.71 / [√(0.71 * 0.29) / 110]

= 0.12 / 0.043265

= 2.77360453

Test statistic = 2.77

c) P-value

P(z > 2.77) = 2 * [1 - P(z < 2.77)] = 2 * 0.0028

P-value = 0.0056

∝ = 0.01

P-value < ∝

Reject the null hypothesis.  There is sufficient evidence to support the researchers claim at the 1% significance level.


Related Questions

the first third and sixth terms of an arithmetic sequence are shown. what is the common difference between consecutive terms in the arithmetic sequence 2,_,8,_,_,17,

Answers

Answer:it is going up by 3 each time

Source:trust me bro

Can y’all help me pls

Answers

Answer:

B

Step-by-step explanation:

Volume = 4/3 pi r^3

r = 15 / 2

r = 7.5

Volume = 4/3 * 3.14 * 7.5^3

Volume = 4.1867 * 421.875

Volume = 1766.3 Cubic inches.

Mr. Stip bought a new pair of Jordans and 4 new polo shirts. The price of one pair of jordans were double the amount of one polo shirt. If Mr. Stip spent $510, determine the price he paid for the Jordans.

Answers

9514 1404 393

Answer:

  $170

Step-by-step explanation:

If the price of a pair of Jordans is the same as the price of two shirts, the total purchase has a value equivalent to that of 3 Jordans.

  pair of Jordans = $510/3 = $170

Answer:

$170

Step-by-step explanation:

ILL GIVE BRAINLEYyyyyyyy

Answers

Answer:

2+10x-x^2, the last answer

Step-by-step explanation:

An isosceles triangle has an angle that measures 50°. Which other angles could be in that isosceles triangle? Choose all that apply.

Answers

Answer:

is their any options cause what the question says is to choose or am I wrong.

What is the first step in solving for z in the equation 5z - 4 = 26
O Add 4 to both sides of the equation.
O Subtract 4 from both sides of the equation.
O Multiply both sides of the equation times 5.
O Divide both sides of the equation by 5.

Answers

You would 4 to both sides of the equation

Answer:C

Step-by-step explanation:because we went over this in class

I need to find the x pls help and show work

Answers

Answer:

Start giving more points

Step-by-step explanation:

plus i needed the points

Answer:

x=143

Step-by-step explanation:

deNew image over pre-image so 52/4 would equal x/11 because those sides correspond, then cross multiply to get 572 equals 4x then divide each side by 4 to get x=143

If f(x) = x^5 - 1, g(x) = 5x, and h(x) = 2x, which expression is
O 2(5(95-1))
O 2(593– 1)
O 5((2-9)- 1)2
O (5(2 9)5-1

please hurry ! will mark as brainly

Answers

The answer is 5(2-9)-1)2

What rule would I need to find the derivative of an inverse function?

Implicit
Power
Chain
Quotient

Answers

Answer: implicit

Step-by-step explanation:

What rule would I need to find the derivative of an inverse function?

implicit

Order this set of rational numbers from least to greatest: {-0.51, -8/15, 0.51, 8/15}

Answers

Answer: {-8/15, -0.51, 0.51, 8/15}

Complete the missing value in the solution to the equation:
6x + ==y + 2x
(3,

Answers

Answer:

(3, - 2)

given y = - 2, then

- 2x + 4 = - 2 ( solve for x )

subtract 4 from both sides

- 2x = - 6 ( divide both sides by - 2 )

x = -6/-2 = 3

have a wonderful day :)

-Ary

Given that f(x)=x-9, g(x)=3x^2-2x+5, Find the function

(f+g)(x):_____________

Answers

Answer:

f(g(x)) thats what (fog)(x) is

3(x-9)^2-2(x-9)+5

your answer is 3x^2-56x+266

Step-by-step explanation:

hope it helps

HELP, I am not good at triangles at all

Answers

A, C, D, E, I i think are the answers because for all of the congruent sides there is an angle in the middle. Please please please correct me if Im wrong
C, D, E, and I. I’m in geometry as well

Solve: 2x+28=40
Find out what x is if you can
EXPLAIN WHAT YOU DID FOR BRAINLY

Answers

Answer:

x=6

Step-by-step explanation:

40-28=12

12/2=6

x=6

please mark brainliest, i hope this helps :)

Answer:

x = 6

Step-by-step explanation:

2x + 28 = 40

- 28 -28

2x/2 = 12/2

x = 6

uh please help me plz plz plz

Answers

XY is the correct answer.

Answer:

side xy

Step-by-step explanation:

the shortest side is across from the smallest angle.

using the fact that all angles in a triangle add up to 180 degrees, we can figure out that angle z is 30 degrees

therefore, the opposite side from the smallest angle (angle z) is xy

It helps if you draw the triangle out or try to visualize it

Hope this helps:)

Four triangles are shown

Answers

Answer:

H

Step-by-step explanation:

H )
is the correct answer !

Joaquin is four more than half Marjorie’s age. Marjorie is also 32 less than three times Joaquin’s age.

How old is Marjorie?

Answers

Answer:

She is 40 years of age

Step-by-step explanation:

Let Joaquin age be j

Let Marjorie age be m

From the first part of the question;

j = 4 + m/2

Secondly;

m =3j - 32

Multiply equation i through by 2

2j = 8 + m

m = 2j-8

Equate both m

2j-8 = 3j-32

3j-2j = 32 -8

j = 24

m = 2j-8

m = 2(24)-8

m = 48-8

m = 40

Write the term that best completes each sentence. 1. The purpose of a(n) is to create an accurate drawing of either a very large or very small object. figures. 2. Two geometric figures that are proportional in size are sides. 3. The "bottom" sides of two similar are​

Answers

Answer:

homeostasis

Step-by-step explanation:

sin 70 in surf form​

Answers

Step-by-step explanation:

Calculate sin(70)°

Determine quadrant:

Since our angle is between 0 and 90 degrees, it is located in Quadrant I In the first quadrant, the values for sin, cos and tan are positive.

Determine angle type:

70 is an acute angle since it is less than 90°

sin(70) = 0.93969262030844

Write sin(70) in terms of cos

Since 70° is less than 90,

we can express this in terms of a cofunction

sin(θ) = cos(90 - θ)

sin(70) = cos(90 - 70)

sin(70) = cos(20)

Please help pass my final :(

Answers

Answer:

if ∠1 = 70°, then ∠5= 70°

Hence, option (A) is correct.

Step-by-step explanation:

Given

∠1 = 70°

To determine

We need to determine angle ∠5

From the diagram, it is clear that a transversal line crosses the two parallel lines, the angles in the matching corner would be corresponding angles.

We know that when two lines are parallel, their corresponding angles are equal.

As angle ∠5 is the corresponding angle of angle ∠1 = 70°.

Also, the corresponding angles are equal here.

Therefore,

if ∠1 = 70°, then ∠5= 70°

Hence, option (A) is correct.

i need a very smart person to help me solve this

Answers

Answer:

0.3

Step-by-step explanation:

0.3 is the answer hopes it helps

Pls I NED HELP ASAP I ONLY HAVE 10 MINUTES

Answers

Answer:

20

Step-by-step explanation:

when a letter and a number are next to each other u have to multiply, so x is 5 so 3 x 5 is 15. 15 plus 5 is 20 so 20 is ur answwer

Answer:

20

Step-by-step explanation:

x= 20

3x+5 replace x with 5 than do 3x5=15+5=20

48 inches = feet what it the feet

Answers

Answer:

10.25 ft

Step-by-step explanation:

Annie and her family are on their way to visit some family friends who live 820 miles away from them. Based on the route they choose, they expect to complete their trip in three days. The distances and average speeds for the first two days driven are show below. First day: 6 hours at an average speed of 60 miles per hour Second day: 4 hours at an average speed of 65 miles per hour If the average speed on the third day is 50 miles per hour, how many more hours will it take for them to reach their family friends home?

Answers

Answer:

4 hours

Step-by-step explanation:

The distances and average speeds for the first two days driven are show below.

Step 1

We calculate the total distance covered in the first two days

First day: 6 hours at an average speed of 60 miles per hour

Hence:

1 hour = 60 miles

6 hours = x

x = 60 × 6

x = 360 miles

Second day: 4 hours at an average speed of 65 miles per hour

Hence:

1 hour = 65 miles

4 hours = x

x = 65 × 4

x = 260 miles

The distance covered for the first two days =

(360 + 260)miles

= 620 miles

Step 2

The total distance for the entire trip = 820 miles

Hence, the distance left to cover on the third day = (820 - 620)miles

= 200 miles

In the question, we are told:

If the average speed on the third day is 50 miles per hour,

The number of hours it will take for them to reach their family friends home is calculated using the formula

Time = Distance/Speed

Time = 200 miles/50 miles per hour

Time = 4 hours

Zoey is 362 meters below sea level while visiting a part of Israel. She descends 71 meters to visit the Dead Sea. Which integer represents the elevation, in meters, of the Dead Sea? i will give 25 points

Answers

Answer:

Zoey is -362 meters from sea level.  She travels another -71 meters (notice the negative because she is now further away from sea level).  She is now -433 meters from sea level.

Step-by-step explanation:

-362 (original elevation) + -71 (distance to new location) = -433 (total elevation)

Answer:

-433

Step-by-step explanation:

Zoey is already 362 below sea level.

Then she descends another 71 meters

So. . .

-362 - 71

This can also be written as -362 + (-71)

-433

Hope this helps :)

Please consider Brainliest :)

Solve the equation by finding the common multiple.

three fourths minus two sixths plus seven twenty fourths equals blank

Help!

Answers

My answer~

1253/9997 or 0.12534

My explanation~

3/4 - 2/6 + 7/24

convert into decimals

3/4 = 0.75

2/6 = 0.333

7/24 = 0.29166

then use PEMDAS add first

0.333 + 0.29166 =

0.62466

then subtract

0.75 - 0.62466 =

0.12534

then convert back or leave as is

1253/9997

what you would get when converting back to a fractionhope i helped :P---------------------------------------------------------------

Answer: 11/6 that is it!

Which expression is equivalent to
8(3x+4w)

Answers

Answer:

24x+32w

Step-by-step explanation:

24x+32w is the answer I think

Solve this -7 3/5 + (-3 2/3)
A-10 1/2
B-11 4/15

C- 4 1/2
D-10 9/15

Answers

9514 1404 393

Answer:

  B  -11 4/15

Step-by-step explanation:

  -7 3/5 -3 2/3 = -(7 3/5 +3 2/3)

  = -((7 +3) +(3/5 +2/3)) = -(10 +9/15 +10/15)*

  = -(10 +19/15) = -(10 +1 4/15)

  = -11 4/15

___

* you know at this point that the correct answer is B. The integer part cannot be 10, but must be 11.

-9+n/4=-15 answer????

Answers

Answer:

-2

Step-by-step explanation:

9+n/4= -15

cross multiply

9+4-15=n

13-15=n

n=-2

EASY MATH PROBLEM!
Please help me! Will mark brainliest for sure!

Answers

Answer:

A

Step-by-step explanation:

Answer:

The answer would be A

Step-by-step explanation:

Use the formula for |A| <= B which is: -B <= A <= B

For this example you would do:

1. Insert the numbers into the formula: -6 <= 2x - 8 <= 6

2. first do the math for -6 <= 2x-8 which is 1 <= x

3. then do the math for 2x - 8 <= 6 which is x <= 7

4. Put that together and you get 1 <= x <= 7

Good luck on the other questions!

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