In a Certain Region, a Researcher Found That Among 2000

Short Answer

In a certain region, a researcher found that among 2000 people who survived to
their 64th birthday, there were 40 deaths before they reached age 65. Use Table
13-1 and a significance level of .05 to test the claim that this is an unusually high
number of deaths.
-Determine the value of the z test statistic.