Repeat exercise 17, but this time select 10 random samples of size 15 from the marks data set. Compare the sample averages you get from these 10 samples with the sample averages you got in exercise 17. Which averages are closer to the true population average? What do you expect the answer should be, and why?
In exercise
A data set of marks is available in the file called CRE01-17.Select 10 random samples of size 10 from this data set. Using the =AVERAGE function in Excel, calculate the average mark from the population data, and calculate the sample average from each sample.