Which of the following is/are an assumption(s) for calculating a mean?
I.Requires interval or ratio data.
II.Requires ordinal, interval, or ratio data.
III.Requires a perfectly normal distribution of the data.
IV.Requires an approximately normal distribution of the data.
V.Requires highly skewed data.
A)I
B)II
C)III & V
D)I & IV
E)I & III

Question

Quizplus · Accepted Answer

The assumption for calculating a mean is that it requires interval or ratio data, and an approximately normal distribution of the data. Ordinal data can also be used to calculate a mean, but it is not necessary. A perfectly normal distribution is rare in practice, so an approximately normal distribution is acceptable. Highly skewed data can affect the accuracy of the mean, but it is not necessarily an assumption for calculating the mean.

Which of the Following Is/are an Assumption(s) for Calculating a Mean