Mean, Median & Mode Flashcards

All 5 cards in this deck

What is the mode of a set of data?

The value that occurs most often.

What is the formula for the mean of a list of data?

$\text{mean} = \dfrac{\text{sum of the values}}{\text{number of values}}$

True or false? If a data set has an even number of values, the median must be one of the values in the data set.

False. The median is the mean of the two middle values, which may not be a value in the set.

Which average is usually the most appropriate for a data set containing a few extreme values, and why?

The median, because the mean is affected (distorted) by the extreme values.

Which average can be used for non-numerical (categorical) data such as favourite colour?

The mode (the modal category).