An Economics Professor Randomly Selected 100 Millionaires in the United $53.3 < \mu < 56.3$

Multiple Choice

An economics professor randomly selected 100 millionaires in the United States. The average age of these millionaires was 54.8 years. If the standard deviation of the entire
Population of millionaires is 7.9 years, find the 95% confidence interval for the mean age
Of all United States millionaires.

A) $53.3 < \mu < 56.3$
B) $52.8 < \mu < 56.8$
C) $54.0 < \mu < 55.6$
D) $53.5 < \mu < 56.1$