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Question

The mean cannot be found for which of the following data sets?


A
Only data set 1
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B
Only data set 3
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C
Only data set 2
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D
Data sets 1 and 2
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Solution

The correct option is B Only data set 3
By definition, mean = Sum of all data pointsNumber of data points

Thus, there needs to be numerical data to find mean.

Data sets 1 and 2 are numerical data sets, whereas data set 3 is a catagorical data set.

Hence, we cannot find the mean of data set 3.

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