Question

In a recent survey of 160 randomly selected college students, 126 said that they believe in the existence of extraterrestrial life.
A) Find p̂, the sample proportion that believes that there is extraterrestrial life.

B)The 99 % margin of error associated with this estimate is:

C) The 99 % confidence interval for the true proportion of all college students who believe there is extraterrestrial life is:

D) Suppose the proportion of the general US population who beleive in extraterestrial life is 0.38. Choose the appropriate null and alternative hypothesis that tests whether the pro

Answer 1

@whpalmer4

Answer 2

I got part a b and c. I need help with D

Answer 3

H0: p = 0.38
Ha: p > 0.38
H0: x = 0.38
Ha: x > 0.38
H0: p = 0.38
Ha: p ≠ 0.38
H0: μ = 0.38
Ha: μ ≠ 0.38
H0: p̂ = 0.38
Ha: p̂ > 0.38

Answer 4

these are my options. I am kind of confused right now on notation because usually we use mue to respresent the actual mean and p^ is population praportion?

Answer 5

@tkhunny

Answer 6

I got it figured out

Answer 7

but part b and c are wrong.. I am pretty sure my calcuations are correct

Answer 8

@UsukiDoll can you check my work if I attach an image?

Answer 9

sorry I'm not good in that area... like I know math, but not this type.

Answer 10

@raffle_snaffle What is the complete question in letter D. I'll help with this statistical problem. :)

Answer 11

@PrincessVentures I already got it figured out. But can you check my work for part b and c?

Answer 12

For some reason it's wrong...

Answer 13

I will check. Wait.

Answer 14

@raffle_snaffle You forgot the square root in letter C. :)

Answer 15

okay what about part b

Answer 16

I think my standard error is wrong. I am using the wrong method

Answer 17

@raffle_snaffle In part b, you solve for the margin of error by using the \[Z _{\alpha/2}\sqrt{pq/n}\]

Answer 18

yep that is right. Okay thanks

Answer 19

@PrincessVentures

Answer 20

I will give you a medal as soon as you check my work....

Answer 21

Because I am getting it wrong after making my corrections.

Answer 22

wait i think i found it. hold on

Answer 23

do part b and lets compare answers

Answer 24

well do part b and c and lets compare answers

Answer 25

well do part b and c and lets compare answers

Answer 26

I got the answer. I will give you a medal.

Answer 27

What are your answers so I can check.

Answer 28

Well it doesn't matter because I got it right. I need help with another problem.