okay I have some problems that i am going to try my best to let you see what work I did. Le me know if I am right or where I went wrong and then I will fix it

A contractor desires to build new homes with fireplaces. He read that 80% of all home buyers want a fireplace. To test his claim he selected a sample of 30 homes and found that 20 wanted a fireplace. Use alpha = .02 to test his claim. Use the p-value method.

ho=p</U].80hi=>.80

P (hat)=20/30=.67

z= (.67)-(.80)

_____________

square root of (.67)(.33)

____________________

30

i got 1.52

and cv= .4357

(.5-.4357)=.0643>.02

do not accept the null

2nd ?

what is the equation for the regression line if n=7, sum of x=69, sum of y=528, sum of xy=4754, and sum of x squared =825

I got y1=106.089 + 290.679x

3rd ?

a study was conducted to determine if there was a relationship between the prices of a non-member of a club paid for various publications and the prices that a member paid for the same publications. Find the value of sum of x squared

x= 58, 42, 46, 32, 25, 75, 35, 63

___________________________

y= 32, 22, 20, 16, 19, 58, 34, 48

i got the sum of x squared is 19712

do i need to go further with this, because that is all it asked for,

let me know

hilary