Set 1: 48.2 58.3 62.1 53.8 72.4 56.8 54.1 66.4
Set 2: 44.5 52.1 54.2 46.4 52.7 74.2 51.3 52.4
a. With 90% confidence levels, determine wheter the two samples are statistically the same or different.
b. Find the range for the true(or population) mean for each set with 90% confidence levels.