Chapter 3 Review Homework

21.

The following graph is an ogive of a standardized​ test’s scores. The vertical axis in an ogive is the cumulative relative frequency and can also be interpreted as a percentile. Complete parts a through c.

a) Find and interpret the percentile rank of a test score with a value of 140

A test score of 140 corresponds to the ___ percentile rank since this percentage of test scores are _______ a test score with a value of 140

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b) Find and interpret the percentile rank of a test score with a value of 160.   A test score of 160 corresponds to the _____  percentile rank since this percentage of test scores are _______ a test score with a value of 160

.

.c) What score corresponds to the 10th ​percentile?

The 10th percentile corresponds to a test score of _____