The number of wins in a season for 32 randomly selected professional football teams are listed below. Construct a 90% confidence interval for the true mean number of wins in a season.
9 9 9 8 10 9 7 2
11 10 6 4 11 9 8 8
12 10 7 5 12 6 4 3
12 9 9 7 10 7 7 5