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
2. e. none of these (80)
3. a. 0
4. b. 6
5. e. none of these (10)
6. a. 5
2. angles qrt and qst both measures 156 degrees.
we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.
we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.
since we know that angles subtended by the same arc at the circumference are always equal.
by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.
therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.