Question
Elementary Statistics by Mario Triola, 13th edition Chapter 8.1.14 Claim: Fewer than 97% of adults...
Elementary Statistics by Mario Triola, 13th edition Chapter 8.1.14
Claim: Fewer than 97% of adults have a cell phone. In a reputable poll of 1056 adults, 87% said that they have a cell phone. Find the value of the test statistic.
The value of the test statistic is? (Round to two decimal places as needed.)
Homework Answers
Answer #1
Let p be the proportion of adults who have a cell phone.
In a reputable poll of 1056 adults, 87% said that they have a cell phone.
Therefore, 
We want to test the claim that fewer than 97% of adults have a cell phone.
The hypothesis testing problem is:
The test statistic is:
Hence test statistic is:
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