The following data represents the number of points scored by players on a high school basketball team this season.
Player 1 68 Player 6 128
Player 2 82 Player 7 66
Player 3 145 Player 8 54
Player 4 111 Player 9 221
Player 5 97 Player 10 99
a. Find the sample mean and the sample standard deviation.
b. Construct a 90% confidence interval for the population mean and interpret the results. Assume the population of the data set is normally distributed.