Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 2 - Frequency Distributions and Graphs - 2-2 Histograms, Frequency Polygons and Ogives - Exercises 2-2 - Page 66: 3

Answer

The following figure shows the the grouped frequency distribution with 6 classes, the frequency histogram, the frequency polygon, and an ogive. From the distribution, we can see that it is right skewed and the cumulative frequency becomes flat towards higher numbers.
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Work Step by Step

Data range: $254-3=251$ Bin width (6 classes): $\frac{251}{6}=41.8\approx42$ Start point: 2.5 (to avoid any data fall on the boundaries) Count the number of data point in each bin for the frequency as listed in the figure above.
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