Testing a claim about a population proportion: 1PropZTest (Your Turn!)

Mr. Hooper claims that over 10% of the main-text pages in a statistics textbook are "morbid" involving death, drugs, or dangerous disease. Test this claim at a 5% significance level.

a)  State the parameter of interest. Write out the null and alternate hypothesis.

b) Gather your sample. Use your graphing calculator to randomly choose pages. Scan the page and use your discretion to determine if the page has "morbid" content. If the page is not at least half text (or a page in the index, for example), ignore the page.

Pages that are morbid: 

Total pages inspected: 

Sample proportion:

 c) Were the necessary conditions present in your sample in order to carry out this inference procedure? Explain.

 d) "Crunch the numbers." Calculate the following:

$\displaystyle \sigma_{\hat{{{p}}}}$ :

Test statistic (z):

 p-value: 

e) Should the null hypothesis be rejected (yes or no)? 

Write a conclusion in context: