Frequency Tables, Histograms, and Dot Plots

Frequency Tables and Histograms

Goal

I can ​make and analyze frequency tables and histograms.

Vocabulary

A graph that uses bars to show ​the number of values in each category or interval.

​Histogram

Shows the number ​of times a value occurs in each category or interval.

​Frequency Table

Example 1: Make a frequency table and histogram

Mr. Maxwell ​timed the cross-country team in a 2-mile run and recorded the times in the table shown. He wants to analyze the runners' times. What is one way that Mr. Maxwell can record the data?

Example 2: Use frequency tables to solve problems.

Zach ​surveys a group of middle school students and asks them how many texts they sent yesterday. The table shows the result.

Is the greatest ​number of texts sent between 60-79?

​Is the lowest number of texts sent between 20-39?

​How many students sent between 20-59 texts?

Example 3: Use a histogram to solve problems

The histogram shows ​the number of points that Kendra scored during each basketball game she played last season.

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How many games did Kendra play last season?

​In how many games did Kendra score 5-9 points?

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Try it:

A data set contains ages ranging from 6 to 27.

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6, 11, ​9, 13, 18, 15, 21, 15, 17, 24, 27, 12

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Make a frequency table and a histogram that represents this data.​

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Try it:

How many students in ​Ms. Gioia's class took the science test?

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​How many students had scores that were 80 or lower than had scores that were 90 or higher?

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