Chapter 8, Problem 69P

Use the following information to answer the next flue exerrises’ Of 1,050 randomly selected adults. 360 identified themselves as manual laborers, 280 identified themselves as non-manual wage earners. 250 identified themselves as mid- level managers, and 160 identified themselves as executives. In the survey, 82% of manual laborers preferred trucks, 620% of non-manual wage earners preferred trucks, 5-1% of mid-level managers preferred trucks, and 26% of executives preferred nicks.

We are interested in finding the 95% confidence interval for the percent of executives who prefer trucks. Define random variables X and P in words.