An Economist Is Interested in Studying the Incomes of Consumers

Multiple Choice

An economist is interested in studying the incomes of consumers in a particular region. The population standard deviation is known to be $1,000. A random sample of 50 individuals resulted in an average income of $15,000. What is the upper end point in a 99% confidence interval for the average income?

A) $15,052
B) $15,141
C) $15,330
D) $15,364