Medical Statistics at a Glance
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Wiley-Blackwell

MCQs

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Chapter 5, Question 1.
Arithmetic mean

Select all of the following statements which you believe to be true. The arithmetic mean of a set of values:

Is a particular type of average.
Is a useful summary measure of location if the data are skewed to the right.
Coincides with the median if the distribution of the data is symmetrical.
Is always greater than the median.
Cannot be calculated if the data set contains both positive and negative values.