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 - Page 776: 6

Answer

55 students had a stress rating of 8 or more.

Work Step by Step

Using the table given, we look at the frequencies of 8, 9, and 10. The value of 8 had a frequency of 26. The value of 9 has a frequency of 15 and the value of 10 had a frequency of 14. We add those frequencies together: 26 + 15 + 14 and get 55.
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