Question

Problem 2

Psychologists have done several studies examining mode of delivery for textbooks, comparing comprehension after reading material from a traditional paper textbook versus various electronic devices. Dr. Hangon decided to see if he could replicate these earlier studies. He tested 13 participants in three conditions: 1) paper textbook, 2) reading from a laptop-sized screen, and 3) reading from a cell-phone sized screen. In each condition, participants read 1500 words. Order of text delivery mode was counterbalanced across participants.The dependent variable was the score on a 7-item comprenhension test. Did Dr. Hangon find any difference between the difference modes of text delivery?

Participant	paper text	laptop text	cellphone text
1	7	3	1
2	4	4	3
3	6	6	3
4	7	7	1
5	3	3	2
6	4	4	4
7	5	5	7
8	6	2	2
9	4	3	2
10	6	6	6
11	7	7	4
12	3	3	2
13	6	6	4

For hypothesis testing questions, use the four-step procedure outlined in class and assume α = 0.05, unless instructed to do otherwise in the problem. For all problems, provide a conclusion for each question in everyday English.

For ANOVA question(s), include a post-hoc test and an effect size calculation. For correlation questions, include a scatterplot that incorporates a regression line.

To obtain full credit, show any calculations that are required via formulas in Excel. Use the sample assignment 3 as a model.

(Please show all your work! THANKS!!!)

Answer 1