Researchers carried out a survey of fourth-, fifth-, and sixth-grade students in Michigan. Students were asked whether

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Researchers carried out a survey of fourth-, fifth-, and sixth-grade students in Michigan. Students were asked whether good grades, athletic ability, or being popular was most important to them. The two-way table summarizes the survey data.

Grade 4th grade 5th grade 6th grade Total Grades 49 50 69 168 Most Athletic 24 36 38 98 important Popular 19 22 28 69 Total 92 108 135 335


Suppose we select one of these students at random. What’s the probability of each of the following?

a. The student is a sixth-grader or rated good grades as important.

b. The student is not a sixth-grader and did not rate good grades as important.

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The Practice Of Statistics

ISBN: 9781319113339

6th Edition

Authors: Daren S. Starnes, Josh Tabor

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