1. how often something occurs
Frequency Tables and Histograms
Frequency:
Frequency Table: Histogram:
Frequency tables (and their histograms) usually have between _____ and _____ intervals. In order to calculate the width (range) of each interval, _____________ the range by the number of intervals you want.
1. Students answered a
survey question about
how long it takes to get
ready in the morning.
The histogram shows
the survey results.
. Which interval indicates the answers most students gave?
. How many students answered the survey question?
. Why might no students have given an answer in the interval 50-59?
how often something occurs
A data display that groups data into intervals to show frequencies
Bar graph that shows data from a frequency table.
Notice there are no spaces between bars (like a regular bar graph).
DIVIDE

2. 2. In the United States, hurricane season starts June 1 and lasts about 26 weeks. Meteorologists record the number of weeks into the season each hurricane occurs. The number of weeks into the hurricane season in which Atlantic hurricanes occurred from 1997 to 2000 are listed below. Make a frequency table of the data, then a histogram.
6, 7, 14, 12, 13, 14, 16, 16, 17, 17, 19, 21, 26, 12, 12, 13, 15, 15, 20, 20, 24, 10, 12, 15, 16, 17, 17, 18, 20
Frequency table:
Interval Tally Frequency