timer Asked: May 6th, 2013
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Question Description

A researcher has been hired by a pizzeria to determine which type of crust customers prefer.  The restaurant offers three types of crust: hand tossed, thick, and thin.  Following are the mean number of 1 inch pieces of pizza eaten for each condition from 10 subjects who had the opportunity to eat as many pieces with each type of crust as they desired.  The ANOVA summary table also follows.

Source                         Df                 SS                 MS               F

Subject                                            2.75

Between                                        180.05

Error                                                21.65

Total                                               204.45

Crust type                                  Mean                N

Hand-tossed                              2.73                 10

Thick                                          4.20                 10

Thin                                            8.50                 10

A.  Complete the ANOVA summary table

B.  Is Fobt significant at a = .05; at a = .01?

C.  Perform post hoc comparisons if necessary.

D.  What conclusion can be drawn from the F-ratio and the post hoc comparisons?

E.  What is the effect size, and what does this mean?

F.  Graph the means.

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School: UC Berkeley

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