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Mode


The previous example considered the ages of people presenting with a particular medical condition. An alternative measure of central tendency that could be used for this example is the 'mode'. The mode is the most common value in the data set:

20

24

22

65

20

20

The mode of the ages is 20.

The 'mode' is used with 'categorical' data, that is data that can be placed into discrete categories, rather than measured on a continual scale. This data can be either a number or a name. For example, one hundred patients were asked to rate the quality of nursing care in a clinic. The results were:

Rating
Frequency of Response
Very Poor
0
Poor
4
Average
24
Good
47
Excellent
22
Not Answered
3
Total
100

The mode is 'Good'.

Salary levels of 6 employees in a company are:

$25,200

$34,000

$243,000

$43,200

$43,200

$31,000


Specify the mean, median and mode salary levels:

Mean:

Median: Mode:
 

Which measure is likely to be the most useful in this example?
Mean: Median: Mode:
 

 
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