Stat Unit

Central Tendency and the Interval/Ratio Level of Measurement

With Interval/Ratio level variables, it is possible to use the mode, median, and the mean. A good example of an interval/ratio variable is income. Consider the following distribution:

Income
$22,500.00
$22,500.00
$30,000.00
$33,000.00
$37,500.00
$29,100.00

In this distribution, the modal income is $22,500.00.

The median income is $29,550.

The mean or the arithmetic average is $29,100.00.

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