Measures of central tendency

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Measures of central tendency.

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Learning Objectives:. To define and calculate mean, median, and mode..

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Measures of central tendency. It is a single value that attempts to describe a set of data by identifying the central position within that set of data. Measures of central tendency are sometimes called measures of central location..

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There are three main Measures of central tendency.

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Mean. It is the sum of all values divided by the total number of values..

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Mean. Consider the following number set:. 4, 4, 5, 6, 8, 9, 11..

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The mean can only be used on interval and ratio levels of measurement because it requires equal spacing between adjacent values or scores in the scale..

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median. Is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average..

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median. Consider the following number set:. 4, 4, 5, 6, 8, 9, 11..

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MODE. It is the most frequent score in our data set. It’s possible to have no mode, one mode, or more than one mode..

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Mode. Consider the following number set:. 4, 4, 5, 6, 8, 9, 11..