Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 12 - Statistics - 12.1 Sampling, Frequency Distributions, and Graphs - Exercise Set 12.1: 13

Answer

13

Work Step by Step

The number of students with at least 30 social interactions for the week is found by starting with the row showing 30 - 34 social interactions, and adding the frequency of that row, the frequency of the 35-39 row, the frequency of the 40-44 row, and the 45-49 row. This gives us: 4 + 3 + 3 + 3 = 13
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