7.8. Histograms http://www.ck12.org
TABLE7.13:
Bin Tally Frequency
[ 0 − 5 ) |||| ||||| 11
[ 5 − 10 ) |||||||| 9
[ 10 − 15 ) |||| |||||| 12
[ 15 − 20 ) |||| |||||||| 14
[ 20 − 25 ) |||||| 7
[ 25 − 30 ) |||| |||| 10
[ 30 − 35 ) |||| |||||| 1211 + 9 + 12 + 14 + 7 + 10 + 12 = 75
Now that you have constructed the frequency table, the grouped data can be used to draw a histogram. Like a bar
graph, a histogram requires a title and properly labeledx- andy-axes.
Example C
Use the data from Example A that displays the ages of the lottery winners to construct a histogram. The data is
shown again below. What percentage of the winners were 50 years of age or older?
TABLE7.14:
Bin Frequency
[ 20 − 30 ) 3
[ 30 − 40 ) 5
[ 40 − 50 ) 6
[ 50 − 60 ) 8
[ 60 − 70 ) 5
[ 70 − 80 ) 3Use the data as it is represented in the distribution table to construct the histogram.