Question

Two-way ANOVA:

An industrial psychologist was interested in the impact of Introductory Message (general greeting, inquiry, or statement) and Type of Phone (land line or cell) on the length of a phone call. The data appear below.

Use SPSS to analyze the data and answer the following questions. Be sure to include your SPSS output (you will need to copy/paste the ANOVA table into a Word document first).

Phone Message

Phone Type	General	Inquiry	Statement
Land Line	8 9 8 4 7 5	8 10 9 6 7 8	3 4 5 6 2 1
Cell	9 8 6 7 10 9	10 8 7 6 5 8	2 1 4 3 3 2

1.       What are the F statistics (in appropriate APA style) for:

1.       The main effect for Phone Message
2.       The main effect for Phone Type
3.       The interaction of Phone Message and Phone Type

2.       Regarding each of the above F statistics, what are your decisions for (alpha = .05):

1.       The main effect for Phone Message
2.       The main effect for Phone Type
3.       The interaction of Phone Message and Phone Type

3.       Do you need to test simple effects?

4.       Do you need to conduct any follow-up analyses of main effects (post hoc tests)?

5.       Do you need to determine the effect size for any of the results? If yes, what are the results?

Answer 1

The SPSS output is:

There is a main effect for Phone Message. (F = 32.35, p = .000)

There is no main effect for Phone Type. (F = .043, p = .838)

There is no interaction between Phone Message and Phone Type. (F = 1.838, p = .177)

There is a significant difference between the Statement and General.

There is a significant difference between the Statement and Inquiry.