In a Sampling Application to Determine the Average Age of Employees

Multiple Choice

In a sampling application to determine the average age of employees in management positions,the sample estimate was 50 years,reliability was 80 percent,and precision was 10 years.Which of the following would most likely result from an increase in the desired level of reliability to 90 percent?

A) The sample estimate would increase to 55 years.
B) The precision interval would be 40 to 60 years.
C) The precision interval would be 35 to 65 years.
D) The precision interval would have a lower probability of including the true (unknown) population average.