Use the Confidence Level and Sample Data to Find a Confidence

Multiple Choice

Use the confidence level and sample data to find a confidence interval for estimating the population µ. Round your answer to the same number of decimal places as the sample mean.
-39 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 29.9 pounds and a standard deviation of 3.0 pounds. What is the 95% confidence interval for the true mean weight, µ, of all packages received by the parcel service?

A) 28.7 lb < µ < 31.1 lb
B) 29.0 lb < µ < 30.8 lb
C) 29.1 lb < µ < 30.7 lb
D) 28.8 lb < µ < 31.0 lb