Lab 11: Multiple Group Analyses

Instructions

For today’s lab you will need to complete the Lab 11: Multiple Group Analyses Worksheet.

Learning Objectives

1. Practice using SPSS to perform k-group One-Way ANOVAs and Chi-Square analyses.

Homework checker

How to use the Homework Checker!

1. Select or Type your answer into each blank box. Round to 2 decimal places where appropriate.
2. The box will turn green if your answer is correct
3. The box will turn red if your answer is incorrect - try again!
4. Do not forget to take a screenshot of the correct answers to include on your lab worksheet!

Walkthrough Answers

Enter the descriptives and Omnibus F-test statistics for the Mock-Jury Study:

	F	p	df (between)	df (within)	MSE	Do we need to perform LSD pairwise comparisons?
BG ANOVA: RH1						No - a nonsignificant Omnibus F-testYes - significant Omnibus F-test
	N	k	average n
	Mean	SD	n
Beautiful
Average
Unattractive

Enter the post-hoc test for Mock-Jury Study:

LSDmmd
	Mean Difference	LSD Result	Type of Error	Effect Size (r)	Power Problem?
Beautiful vs Average			Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Beautiful vs Unattractive			Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Average vs Unattractive			Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)

Enter the descriptives and Omnibus X² for Mock-Jury Seriousness Study:

	χ²	p	df	N		Do we need to perform pairwise comparisons?
Chi-Square: RH2						No – a nonsignificant Omnibus χ² testYes – significant Omnibus χ² test
Number of Beautiful in sample		Number of Average in sample		Number of Unattractive in sample
Number of Serious in sample		Number of Not Serious in sample

Enter the post-hoc X² tests for Mock-Jury Seriousness Study:

χ² critical
	% Serious	χ² Result	Type of Error	Effect Size (r)	Power Problem?
Beautiful vs Average	% vs %		Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Beautiful vs Unattractive	% vs %		Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Average vs Unattractive	% vs %		Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)

Your Turn Answers

Enter the descriptives and Omnibus F-test statistics for Football Study:

	F	p	df (between)	df (within)	MSE	Do we need to perform LSD pairwise comparisons?
BG ANOVA: RH3						No - a nonsignificant Omnibus F-testYes - significant Omnibus F-test
	N	k	average n
	Mean	SD	n
Control
Football (no concussion)
Football (concussion)

Enter the post-hoc LSD Pairwise Comparisons for Football Study:

LSDmmd
	Mean Difference	LSD Result	Type of Error	Effect Size (r)	Power Problem?
Control vs Football (no concussion)			Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Control vs Football (concussion)			Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Football (no concussion) vs Football (concussion)			Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)

Enter the descriptives and Omnibus X² statistics for Tips-Joke Study:

	χ²	p	df	N		Do we need to perform pairwise comparisons?
Chi-Square: RH4						No – a nonsignificant Omnibus χ² testYes – significant Omnibus χ² test
Number of Advertisement in sample		Number of Joke in sample		Number of No Card in sample
Number of No Tip in sample		Number of Left Tip in sample

Enter the post-hoc X² test for Tips-Joke Study:

χ² critical
	% Left Tip	χ² Result	Type of Error	Effect Size (r)	Power Problem?
Advertisement vs Joke	% vs %		Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Advertisement vs No Card	% vs %		Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)
Joke vs No Card	% vs %		Type I & IIIType II		No - rejecting H0: means there was sufficient powerNo - effect is "too small to be interesting," (r < .10)Yes - The effect is "large enough to be interesting," (r > .10)