Which of the Following Cases Require the Mean of a Sample

question 81

Multiple Choice

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

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