Circumstances in which post tests are used
There is some evidence that students who use Facebook while studying tend to
have lower grades than non-users. A representative study surveyed students to
determine the amount of Facebook use during the time they study or do homework.
Based on the amount of time spent on Facebook, students were classified into three
groups and their scores on a 10-point test were recorded. The following data show
the results:
NonUser
Rarely
Use
Frequent
User
4 1 0
6 4 2 G = 43
3 5 0 ƩX =
193
2
11/11/2022, 19:13 Assignment 2 - Part 2
https://d2l.laurentian.ca/d2l/le/content/169561/viewContent/1584456/View 2/5
7 2 2
5 2 0
T = 25 T = 14 T = 4
SS =
10
SS =
10.8
SS = 4.8
Use an analysis of variance with α = .05 to determine whether these data indicate
any significant mean differences among the treatments (Facebook user groups).
Remember to
1) State the null hypothesis,
2) Show all of your calculations,
3) Make a decision about your null hypothesis,
4) Make a conclusion including an APA format summary of your findings (include
a measure of effect size if necessary), and
5) Indicate what you would do next given your findings
Describe the circumstances in which post tests are used, and explain why these
tests are necessary.