Delete the 5 from the data numbers given for Example 1 and then do the following with the resulting data.

Find the mean using Eq. (22.1), as in Example 4.

Data from In Example 1

Data from In Example 4

Using Eq. (22.1) to find the mean of the numbers of Example 1, we first set up a table of values and their respective frequencies, as follows:

We now calculate the mean x by using Eq. (22.1):

We see that this agrees with the result of Example 3.

Values Frequency 2 1 2 3 1 4 3 5 1 6 1 7 2 8 9 1 2 11 1