For problem 14, The effect of exercise of the amount of lactic acid in the blood was examined in the article "A Descriptive Analysis of Elite-Level Racquetball". Seven women who were attending a week-long training camp participated in the experiment. Blood lactate levels were measured before and after playing three games of racquetball, as shown in the following table: Player 1 2 3 4 5 6 7 Before 11 16 13 18 14 11 13 After 21 26 19 21 14 31 20 14. Construct and interpret a 90% confidence interval for the mean change in lactic acid of female players