Understanding Data Representation: Dot Plots and Histograms

What is the primary benefit of using graphs to represent data?

• To visualize mathematical data in a neat way

• To make it look more complex

• To complicate the interpretation of data

• To increase the amount of data

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What does each dot in a dot plot represent?

• A specific category

• The number of people at a specific height

• The average height

• A specific height in centimeters

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What is the most common height in Chen's class according to the dot plot?

• 136 centimeters

• 149 centimeters

• 143 centimeters

• 140 centimeters

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What distinguishes a histogram from a bar graph?

• Histograms can only display categorical data

• Histograms use lines instead of bars

• Histograms display numerical data grouped into ranges

• Histograms cannot show frequency distribution

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How are the heights grouped in Chen's histogram?

• Every four heights

• Every two heights

• Every three heights

• Every five heights

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Why might a dot plot be more useful than a histogram in certain cases?

• It can better display numerical ranges

• It can identify outliers more easily

• It can show larger amounts of data

• It is easier to create

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What is the most frequent height range in grade 6 according to the histogram?

• 145 to 147 centimeters

• 136 to 138 centimeters

• 139 to 141 centimeters

• 142 to 144 centimeters

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How many students are equal to or shorter than 144 centimeters?

• 6 students

• 28 students

• 15 students

• 22 students

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How did adjusting the histogram's bins help answer specific questions?

• By reducing the number of students

• By simplifying the data

• By organizing the data into more detailed categories

• By making the graph larger

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What is the range of heights with no students in grade 6?

• 140 to 144 centimeters

• 150 to 159 centimeters

• 135 to 139 centimeters

• 130 to 134 centimeters

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