Which of the following cases require the mean of a sample to be calculated using the formula $ \bar{x} $= $\frac { \sum _ { i = 1 } ^ { N } f _ { i } x _ { i } } { N }$ where N represents the sample size?
A) the sample has no mode value
B) there is direct access to the raw data
C) sample data are grouped in a frequency distribution
D) the coefficient of skewness is 1 or less than -1

Question

Quizplus · Accepted Answer

When sample data are grouped in a frequency distribution, the mean is calculated using the formula that incorporates frequencies ($f_i$) and data values ($x_i$).

Which of the Following Cases Require the Mean of a Sample