Lesson 23 - Problem Solving Data Analysis 500 Grade Practice Test Questions TOC | Lumos Learning

Lesson 23 - Problem Solving Data Analysis Question & Answer Key Resources The Scholarly Unicorn's SAT Mathematics Advanced Guide
by Dr. Steve Warner

The Scholarly Unicorn's SAT Mathematics Advanced Guide
by Dr. Steve Warner Lesson 23 - Problem Solving Data Analysis

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15 women went on a 6 month long weight loss program. They recorded their weights, in pounds, before and after completing the program. The results can be seen in the dot plots below (all weights have been rounded to the nearest 10 pounds).

Let \(R_1\) and \(\sigma_1 \)be the range and standard deviation, respectively, of the weights before beginning the weight loss program, and let \(R_2\) and \(\sigma_2\) be the range and standard deviation, respectively, of the weights after completing the weight loss program. Which of the following is true?