Question

*Please provide step-by-step answers*

Question:

A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can affect mental alertness. A sample of n=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 Md=14 points after the meal with SS=1152 for the difference scores.

A. State Ho and H1
B. Is there a significant difference in performance before eating versus after eating? Use a two-tailed test with a = .05
C. Compute the 95% confidence interval for the population mean difference.

Answer 1