Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 12 - Data Analysis and Probability - 12-5 Samples and Surveys - Mixed Review - Page 747: 46


The percentile rank would be 60%

Work Step by Step

You have to find out what percent of scores were less than or equal to 7.5. They were 9 scores that were less than or equal to 7.5. They were 15 scores. So using this information we write a ratio, 9: 15.We divide to get a percent: $\frac{9}{15}$=0.6 . To change into a percent you move the decimal 2 times to the right to get 60%. So the percentile rank of a score of 7.5 is 60
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