A researcher is interested in examining whether the location that a person lives

Question

A researcher is interested in examining whether the location that a person lives is related to the number of hours that they spend on the internet each week. The researcher collected data from a sample of 45 participants who were classified in one of three groups: (1) 15 people who live in an urban setting, (2) 15 people who live in a suburban setting, and (3) 15 people who live in a rural setting. Each participant reported the number of hours they spend on the internet in a typical week (the dependent variable). The researcher found the following descriptive statistics:

1. Urban participants reported an average of 8.9 hours of internet use per week (SD = 2.77)

2. Suburban participants reported an average of 12.7 hours of internet use per week (SD = 4.88)

3. Rural participants reported an average of 9.8 hours of internet use per week (SD = 2.82)

The researcher then ran an analysis of variance to determine whether at least two of these means were significantly different. The researcher found the following:

1. Sum of squares between groups = 78.86

2. Sum of squares within groups = 354.51

Use this information answer questions 1 through 5.

What are the degrees of freedom between groups?

Explanation / Answer

Degrees of freedom between groups = Number of groups - 1 = 3 - 1 = 2   

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