A survey of 1200 randomly selected “individual” hotels in China was conducted to determine the number of guests served, annual hotel income, and the average number of hotel employees.
a. If the average number of employees per hotel in the sample was 28, with a sample standard deviation of 12 employees, produce an 85% confidence interval estimate of the average number of employees per individual hotel in the population of all individual hotels in China.
b. If there is a total of 27,500 individual hotels in all of China, use your interval in part a to build an 85% confidence interval estimate of the total number of people in China who are employed by individual hotels.