When a lot of dataValues, typically letters or numbers. needs to be sorted, one of the most efficient ways is to use a frequency table.
It is important to consider the sizes of groups when sorting data into a frequency tableThe total of the tally marks is called the frequency, which is shown in an addition column to the right. With this extra-column, the table is called a frequency table..
Example
Megan owns a bakery. She counts the number of customers she has at lunchtime each day on 30 consecutive days. These are the results.
13
8
16
12
12
16
7
18
11
16
15
7
11
12
13
21
17
19
11
14
10
19
13
12
7
16
6
14
12
18
13
8
16
12
12
16
7
18
11
16
15
7
11
12
13
21
17
19
11
14
10
19
13
12
7
16
6
14
12
18
It can be useful to put the data into groups to give an overview summary of the data. The smallest number is 6 and the biggest number is 21, so groups that have a width of 5 are reasonable. This will give four groups as shown below.
