Question

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

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

Answer 1

The correct option is B Only data set 3

By definition, mean = $\frac{Sumofalldatapoints}{Numberofdatapoints}$

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.