Question
Asked Dec 28, 2019
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In Exercises 5–8, identify the class width, class midpoints, and class boundaries for the given frequency distribution. Also identify the number of individuals included in the summary. The frequency distributions are based on real data from Appendix B.

Age (yr) of Best Actor
When Oscar Was Won
Frequency
20-29
28
30-39
36
40-49
15
50-59
60-69
70-79
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Age (yr) of Best Actor When Oscar Was Won Frequency 20-29 28 30-39 36 40-49 15 50-59 60-69 70-79

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Expert Answer

Step 1

Class width:

The class width is the distance between two successive lower limits of class intervals.

The formula for class width is as follows:

Statistics homework question answer, step 1, image 1
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Step 2

Class midpoints:

The midpoints of the classes are termed as class midpoints. Each class midpoint is the average of the upper and the lower limits of a class interval.

The formula for midpoint is,

Statistics homework question answer, step 2, image 1
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Step 3
Statistics homework question answer, step 3, image 1
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