A Review of Histograms

A Review of Histograms

Another graphic to use for your data.​

A bar chart is used when you are looking at qualitative data, data that is descriptive while a histogram is used to describe quantitative data, or data that can be counted.

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​Definition

​NOT a bar chart!!

A histogram will use connected bars to summarize the data while a bar chart separates the data because of the categories.

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​Definition

​Histogram

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Multiple Choice

Bar Chart or Histogram?

• Bar Chart

• Histogram

• 6

Multiple Select

Bar Chart or Histogram?

• Bar Chart

• HIstogram

Multiple Choice

Bar Chart or Histogram?

• Bar Chart

• Histogram

Multiple Choice

Bar Chart or Histogram?

• Bar Chart

• Histogram

x - axis: The values, or ranges of values, for the data set.

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y - axis: The frequency of the values.​

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Definition

​The axis of a histogram

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Multiple Choice

How many different age groups were surveyed about their favorite M & M?

• 5

• 6

• 7

Multiple Choice

How many students scored between a 86 and a 90?

• 1
• 3
• 6
• 10

Multiple Choice

How many people watched between 6 and 10 hours of TV last week?

• 31
• 22
• 15
• 35

You can use histograms to determine how your data is distributed and/or skewed. You consider the MEAN and the MODE of the data set.

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Definition

​Left-Tailed Skewed

The bulk of the observations are at or above the median but there are a few observations that are much smaller than the rest.

Right-Tailed Skewed

The bulk of the observations are at or below the median but there are a few observations that are much larger than the rest.

Multiple Choice

Describe the histogram:

• Left Skewed

  (Negative Skewed)

• Normal/Symmetrical

• Right Skewed

  (Positive Skewed)

• Uniform/Flat

Multiple Choice

What is the shape of this bar graph?

• Positive

  (Skewed right)

• Negative

  (Skewed left)

• Symmetrical

• uniform

Multiple Choice

How would you describe this data set?

• Skewed right

• Skewed left

• Symmetric

• Unimodal

Multiple Choice

The following dot plot is

• skewed left

• skewed right

• symmetrical

You are done for now.

It's time to complete the MATH XL.