Question

JenCo is a well established company with thousands of employees and they want to estimate the average age of their workers. A sample of 233 employees was taken. Assuming the population has a standard deviation of 7.5, we want to find a 95% confidence interval for the population mean.

a) What is the value of α?

For full marks your answer should be accurate to at least three decimal places.

α = 0

b) If the mean of the sample is 36.3, what is the confidence interval estimate?

For full marks your answer should be accurate to at least two decimal places.

Confidence Interval: (0, 0)

Answer 1