Histograms A Histogram is a vertical bar graph in which each interval is represented by the width of the bar and the frequency is represented by the height.

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Presentation transcript:

Histograms A Histogram is a vertical bar graph in which each interval is represented by the width of the bar and the frequency is represented by the height of the bar. Test Scores of 32 Students Let’s look at the test score example again. 12 11 10 9 8 7 6 5 4 3 2 1 Frequency 41-50 51-60 61-70 71-80 81-90 91-100 Test Scores ( Intervals)

Another Histogram The following table represents the number of miles per gallon obtained by 40 drivers. Miles per Gallon for 40 Drivers 12 11 10 9 8 7 6 5 4 3 2 1 Frequency 16-19 20-23 24-27 28-31 32-35 36-39 40-43 Mileage (Miles per Gallon)

Cumulative Histogram Cumulative Histogram The following table represents test scores of 240 students in a school. Now let’s make a Cumulative Frequency Table. Cumulative Histogram 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 240 220 200 180 160 140 120 100 80 60 40 20 Frequency Frequency 51-60 61-70 71-80 81-90 91-100 51-60 61-70 71-80 81-90 91-100 Test Scores Test Scores

More Cumulative Histograms The following table represents the number of book students bring home. Cumulative Number of Books Brought Home 25 20 15 10 5 Frequency 0 1 2 3 4 5 6 7 Number of Books

More Cumulative Histograms The following table represents the number of book students bring home. Cumulative Number of Books Brought Home 30 25 20 15 10 5 Frequency 0 1 2 3 4 5 6 7 Number of Books

Homework Page 735: 10 – 13 Make a frequency histogram Make a cumulative frequency histogram