a. Is there is significant reduction in mental alertness after consuming tryptophan versus before? Use a one-tailed test with α = .05. b. Compute r2 to measure the size of the effect.
a. Is there is significant reduction in mental alertness after consuming tryptophan versus before? Use a one-tailed test with α = .05. b. Compute r2 to measure the size of the effect.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 15PPS
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A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can reduce 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 roasted turkey. The average mental alertness score dropped by MD= 14 points after the meal with SS= 1152 for the difference scores. a. Is there is significant reduction in mental alertness after consuming tryptophan versus before? Use a one-tailed test with α = .05. b. Compute r2 to measure the size of the effect.
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