Quiz 2 Hw #13 dataà 942_q2h13_152.sav

The purpose of the study was to look for differential performance over time by those who completed individual vs. group Exam preparation assignments. Data were obtained from two successive semesters of a History of Psychology course. The course included three exams, each of which was preceded by a preparatory assignment designed to review the key issues covered during that portion of the course. During the Fall semester each of these assignments was completed individually by each student. During the Spring semester each of these assignments was completed in groups of three students. The outcome variables were the % scores from each of the three exams.

The data are available from the website exams_mg.sav

Prep Type / Exam Number
Exam #1 / Exam #2 / Exam #3
Individual
Group

a.  Write the cell and estimated marginal means into the table above.

b.  For the interaction F ______df ____, ______MSerror ______p ______r ______

k ______n ______LSDmmd ______

c.  SE of Exam for each Preparation Type: use <, > & = to indicate the RH: and the results based on LSD for each pairwise comparison. Also compute the effect size and indicate whether or not the RH: is supported for each.

Prep Type à / Individual / Group
Examà / E1 vs. E2 / E1 vs. E3 / E2 vs. E3. / E1 vs. E2 / E1 vs. E3 / E2 vs. E3.
RH:
Pairwise results
r
Support RH: ?

d.  SE of Preparation Type for each Exam: Use <, > & = to indicate the results based on LSD for each pairwise comparison. Also compute the effect size.

Examà / E1 / E2 / E3
Prep Typeà / Ind vs. Grp / Ind vs. Grp / Ind vs. Grp
RH:
Pairwise results
r
Support RH:

e.  Is the RH3: about the interaction supported?

Is the RH3: about the interaction supported

f.  For the Exam main effect F ______df __, ____ MSerror ______p ______r ______

k ______n ______LSDmmd ______

g.  ME of Exam Use <, > & = to indicate the results based on LSD for each pairwise comparison. Also compute the effect size

E1 vs. E2 / E1 vs. E3 / E2 vs. E3.
RH:
Pairwise results
r
Support RH: ?

h.  Is the main effect of Exam descriptive or misleading?

i.  Is the RH: about the main effect of Exam supported?

j.  For the Preparation Type main effect F ______df ____, ____ MSerror ______p ______r ______

k.  Is the main effect of Preparation Type descriptive or misleading?

l.  Is he RH: about the main effect of Preparation Type supported?

Write up the results, following the example in the SPSS handouts

·  include a table and a graph

·  incorporate whether or not there is support for the thee RH: (be sure to use the right SE to describe the interaction RH:)

·  include effect sizes for each F-test and pairwise comparison