Chapter 17, Problem 14P

1. In a study investigating freshman weight gain, the researchers also looked at gender differences in weight (Kasparek, Corwin, Valois Sargent, & Morris, 2008). Using self-reported heights and weight, they computed the Body Mass Index (BMI) for each
student. Based on the BMI scores, the students were classified as either desirable weight or overweight. When the students were further classified by gender, the researchers found results similar to the frequencies in the following table.

Desirable

Weight

Overweight

M ales

 l8

1. Do the data indicate that the proportion of over­ weight men is significantly different from the pro­ portion of overweight women? Test with a = .05.
2. Compute the phi-coefficient to measure the strength of the relationship.

Write a sentence demonstrating how the outcome of the hypothesis test and the measure of effect size would be reported in a journal article