Question

1. Testing:

H0:p=0.8H0:p=0.8
H1:p>0.8H1:p>0.8

Your sample consists of 99 subjects, with 74 successes. Calculate the test statistic, rounded to 2 decimal places

z=

2. You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly different from 0.71. You use a significance level of α=0.05α=0.05.

      H0:p=0.71H0:p=0.71
      H1:p≠0.71H1:p≠0.71

You obtain a sample of size n=653n=653 in which there are 487 successes.

What is the test statistic for this sample? (Report answer accurate to three decimal places.)
test statistic =

What is the p-value for this sample? (Report answer accurate to four decimal places.)
p-value =

3. "Trydint" bubble-gum company claims that 6 out of 10 people prefer their gum to "Eklypse". Test their claim at the 90 confidence level.

Based on a sample of 440 people, 262 said they prefer "Trydint" gum to "Eklypse".

The point estimate is:  

The 90 % confidence interval is:  

Answer 1