What information does the “standard deviation” of a mean value tell us?

3. What is the standard deviation used for?

A. As a measure of central tendency

B. As a measure of dispersion

C. As a measure of spread of data that are normally distributed

D. As a measure of the error of the mean value

4. What information does the “standard deviation” of a mean value tell us?

A. It gives us the healthy range of values for the measured physiological quantity.

B. It is the range within which 68% of measured values are found.

C. It tells us that the measured values are normally distributed.

D. It tells us the number of values that were used to calculate the mean.

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