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:: INTRODUCTION TO STATISTICS

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:
 Median Salinity Exercise

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