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.
Please see attachment, the yellow colour are emphasies to be noted
17 x 256=4352
sorry if this is wrong, i'm new.
g = (2, 2)
given the ratio is 1 : 1 then f is the midpoint of eg
let the coordinates of g = (x, y)
using the midpoint formula
(0 + x) = 1 ( multiply both sides by 2 )
0 + x = 2 ⇒ x = 2
(4 + y) = 3 ( multiply both sides by 2 )
4 + y = 6 ( subtract 4 from both sides )
y = 2
coordinates of g = (2, 2)