, 12.11.2019 04:31, christhegreat1

# Aresearcher 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 dinner including roast turkey. the average score dropped by m = 14 points after the meal with ss = 1152 for the difference scores. a. is there is significant difference in performance before eating versus after eating? use a two-tailed test with α = .05. b. compute r2 to measure the size of the effect. c. write a sentence demonstrating how the outcome of the test and the measure of effect size would appear in a research report.

### Other questions on the subject: Mathematics

Mathematics, 21.06.2019 14:00, miriamnelson7545
△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .
What is the distance between the points (2 -3) and (-6 4) on the coordinate plane