Question 1 – Use the Data 1 tab in Excel file.
A researcher wants to estimate the average life expectancy for Wisconsinites. She takes a random sample of 50 Wisconsinites and finds that the average life expectancy is 76.7 years. Also, she assumes that the population standard deviation is 4.5 years.
Report the sample mean estimate, the population standard deviation, and the sample size of this case.
Answer:
Sample mean estimate (x Ì…) =
Population standard deviation (sigma ) =
Sample size (n) =