Questions: Interpreting a histogram CritEek is a website where fans of horror films go to write movie reviews. On the website's home page there is a display of the number of movies reviewed by a selection of the site's top critics. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) How many critics have from 15 to 22 movie reviews? (b) How many critics have 23 or more movie reviews? (c) What is the class width?

Interpreting a histogram CritEek is a website where fans of horror films go to write movie reviews. On the website's home page there is a display of the number of movies reviewed by a selection of the site's top critics. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) How many critics have from 15 to 22 movie reviews? (b) How many critics have 23 or more movie reviews? (c) What is the class width?
Transcript text: Interpreting a histogram CritEek is a website where fans of horror films go to write movie reviews. On the website's home page there is a display of the number of movies reviewed by a selection of the site's top critics. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) How many critics have from 15 to 22 movie reviews? (b) How many critics have 23 or more movie reviews? (c) What is the class width?
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Solution

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Solution Steps

Step 1: Find the number of critics who have reviewed 15 to 22 movies

The bar corresponding to 15 to 22 movie reviews has a height of 6.

Step 2: Find the number of critics who have reviewed 23 or more movies

The bars corresponding to 23 or more movies are 23 to 30, 31 to 38 and 39 to 46. The heights of these bars are 4, 8 and 5 respectively. Therefore, the number of critics who reviewed 23 or more movies is 4 + 8 + 5 = 17.

Step 3: Calculate the class width

The class width is the difference between the upper and lower bounds of any given class. In this histogram, the first class is 7 to 14, so the class width is 14 - 7 = 7.

Final Answer:

(a) 6 (b) 17 (c) 7

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