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Chapter 3: Q. 3.179 (page 138)

Obesity. Researchers in obesity wanted to compare the effectiveness of dieting with exercise against dieting without exercise. Seventy-three patients were randomly divided into two groups. Group 1. composed of 37patients, was put on a program of dieting with exercise. Group 2. composed of 36patients, dieted only. The results for weight loss, in pounds, after 2months are summarized in the following boxplots. The top boxplot is for Group 1. and the bottom boxplot is for Group 2. Use the boxplots to compare the weight losses for the two groups, paying special attention to center and variation.

Short Answer

Expert verified

Weight loss differences in group 1are less than weight loss differences in group 2.

Step by step solution

01

Given information

We need to find out the variation of weight loss in group 1and group 2.

02

Explanation

The whiskers of the boxplot are of low and high value. The box starts at the lower quartile, ends at the upper quartile, and has a straight vertical line at the median.

In general, both groups seem to lose almost the same amount as the median is almost identical in both groups

Now, the weight loss variant in group 1is less than the weight loss variant in group 2because its boxplot is slightly wider than the boxplot of group 2.

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Most popular questions from this chapter

Copperhead and Tiger Snakes. S. Fearn et al. compare two types of snakes in the article “Body Size and Trophic Divergence of Two Large Sympatric Elapic Snakes in Tasmania” (Australian Journal of Zoology, Vol. 60, No. 3, pp. 159-165). Tiger snakes and lowland copperheads are both large snakes confined to the cooler parts of Tasmania. The weights of the male lowland copperhead in Tasmania have a mean of 812.07 g and a standard deviation of 330.24 g; the weights of the male tiger snake in Tasmania have a mean of 743.65 g and a standard deviation of 336.36 g.
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