I'll just show you how to make a frequency table using the above data.Â
We will group the data into class intervals and determine the frequency of the group.
8 12 25 32 45 50 62 73 80 99 4 18 9 39 36 67 33
smallest data value = 4
highest data value = 99
difference = 99 - 4 = 95
number of data = 17
Let us assign a class interval of 20.
Class Interval   Tally                Frequency
0-20           8, 12, 4, 18, 9,           5
21-40 Â Â Â Â Â Â Â Â 25, 32, 39, 36, 33Â Â Â Â Â Â Â Â Â 5Â
41-60 Â Â Â Â Â Â Â Â 45, 50, 67 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3
61-80 Â Â Â Â Â Â Â Â 62, 73, 80 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3
81-100 Â Â Â Â Â Â Â 99 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1
That is how a frequency table look like. Usually, under the Tally column, tick marks are written instead of the numbers but for easier monitoring, I used the numbers in the data set.
