Understanding Dot Plots and Histograms

What is the primary purpose of a dot plot?

• To calculate the mean of a dataset

• To show data distribution using dots

• To display data using bars

• To compare two sets of data

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How do you find the range of data in a dot plot?

• Add all the data points together

• Subtract the highest value from the lowest value

• Divide the sum of all data points by the number of data points

• Count the number of dots

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What does it mean if data is symmetric in a dot plot?

• All data points are the same

• The mean and median are equal

• It has an equal number of data points on either side

• It looks the same on both sides of the center

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Which measure of central tendency is less affected by outliers?

• Mode

• Median

• Mean

• Range

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What distinguishes a histogram from a bar graph?

• Histograms use lines instead of bars

• Histograms display data in intervals

• Histograms are only used for symmetric data

• Histograms cannot show large data sets

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How is the frequency of data represented in a histogram?

• Through the height of bars

• By the width of bars

• Using different colors for each bar

• By placing dots above each interval

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What is the range of ages of workers at Schlitterbahn Waterpark as shown in the histogram?

• 16 to 30 years

• 30 to 44 years

• 21 to 25 years

• 16 to 44 years

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CCSS.2.MD.D.9

Which age group had the highest frequency of workers at Schlitterbahn Waterpark?

• 26 to 30 years

• 41 to 45 years

• 21 to 25 years

• 16 to 20 years

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What is a disadvantage of using histograms to display data?

• Cannot display exact values

• Cannot show large data sets

• Bars cannot touch each other

• Only suitable for symmetric data

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Why might it be difficult to compare two sets of data using histograms?

• Because histograms require data to be symmetric

• Because histograms use intervals, obscuring individual data points

• Because histograms can only display a limited number of intervals

• Because histograms only show positive values

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