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Chapter 4: Measures of Position
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Observe that the number of values below 12 is 9 and the total number of
values in the data set is 12. Thus, using the formula, the corresponding
percentile is
( )
.
That is, the value of 12 corresponds to approximately the 79
th
percentile.
We can also use the
Basic Statistics
workbook to compute the answer. The
output is given in
Figure 4-8
. Note the data was entered in the Data 1
column in the workbook.
Figure 4-8:
Computed percentile for
Example 4-3
Example 4-4:
What is the percentile rank for a shoe size of 10 for the
information given in
Example 4-3
?
Solution:
The ordered set from
Example 4-3
is repeated next.
8 8 9 9 9 10 10 11 11 12 13 13
Observe that the number of values below 10 is 5 and the total number of
values is 12.
Thus, using the formula, the corresponding percentile is
( )
.
Click here for the Basic Statistics Workbook