12.48 Refer to Exercise 12.47. Phillips and Pepper

(1982) give data on another factorial experiment utilizing 20 males and 20 females. The experiment involved the same treatments, with ten persons assigned to each sex/weight category.

The response measured for each person was the pulling force the person was able to exert on the starter cord of P-250 fire pump.The means and standard deviations of the four samples (corresponding to the categories of the experiment) are shown in table below.

a Use the procedures outlined in Exercise 11.42 to perform an analysis of variance for the experiment. Display your results in an ANOVA table.
b Explain the practical significance of the presence (or absence) of sex/weight interaction.
Do the data provide sufficient evidence of a sex/weight interaction?
c Do the data provide sufficient evidence to indicate a difference in force exerted between light men and light women? Test by using .
d Do the data provide sufficient, evidence to indicate a difference in force exerted between heavy men and heavy women? Test by using a = 0.05.

Transcribed Image Text:

Light Standard Heavy Standard Mean Deviation Mean Deviation Female 46.26 14.23 62.72 13.97 Male 88.07 8.32 86.29 12.45