2. Describing Data with Tables and Graphs
Histograms
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Use the frequency histogram below to determine (a) the number of classes and (b) the class width.
A
(a) 5 classes; (b) 2
B
(a) 5 classes; (b) 3
C
(a) 4 classes; (b) 3
D
(a) 14 classes; (b) 2
Verified step by step guidance1
Identify the number of classes by counting the distinct bars in the histogram. Each bar represents a class.
Count the number of bars in the histogram. In this case, there are 5 bars, indicating 5 classes.
Determine the class width by examining the range of each class. The class width is the difference between the upper and lower boundaries of a class.
Look at the first class, which ranges from 0 to 2. The class width is calculated as 2 - 0 = 2.
Verify the class width by checking other classes. For example, the second class ranges from 3 to 5, and the width is 5 - 3 = 2. This confirms the class width is consistent across all classes.
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