EXAMPLE 2 Making a Frequency Table Roller Coasters 66.4, 94.5, 68.3, 115, 62.5, 97, 66.4, 126.5, 63.4, 74.7, 63.4, 70.1, 66.4, 64.9, 63.7, 79, 63.4, 63.1,

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EXAMPLE 2 Making a Frequency Table Roller Coasters 66.4, 94.5, 68.3, 115, 62.5, 97, 66.4, 126.5, 63.4, 74.7, 63.4, 70.1, 66.4, 64.9, 63.7, 79, 63.4, 63.1, 62.5, 61.9, 71.6 The data show the heights, in meters, of some of the tallest roller coasters in the world. Make a frequency table of the data.

EXAMPLE 2 Making a Frequency Table SOLUTION STEP 1 Choose intervals of equal size for the data. The intervals should include numbers from 61. 9 to 126. 5. STEP 2 Tally the data in each interval. Use tally marks to record each occurrence of a height in its interval. STEP 3 Write the frequency for each interval by totaling the tally marks.

EXAMPLE 2 Making a Frequency Table

EXAMPLE 3 Making a Histogram Make a histogram of the data in the frequency table above. STEP 1 Draw and label the horizontal and vertical axes. Start the vertical scale at 0 and end at a point greater than 13. Use equal increments. STEP 2 Draw a bar to represent the frequency of each interval. The bars of neighboring intervals should touch. STEP 3 Write a title for the histogram.

EXAMPLE 3 Making a Histogram

GUIDED PRACTICE for Examples 2 and 3 4.4. Using the data from Example 2, make a new frequency table using 6 intervals. Then make a histogram from your frequency table. What If? SOLUTION

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