A researcher would like to examine how the chemical tryptophan. contained in foods such as turkey, can affect mental alertness. A sample of =9 college students is obtained, and each student's performance on a familiar video game is measured before and after eating a traditional Thanksgiving dinner including roast turkey. The average score dropped by Mo- 14 points after the meal with SS- 1152 for the difference scores. a, Compute and record Mp. b. Compute and record the estimated standard error for the mean difference c. Compute and record the Computed T d. Compute and record the Confidence Interval Mean Difference e. Locate and record the critical T value