Which of the following is the best explanation for why the standard deviation is almost always reported with the mean?
a. The standard deviation measures the spread of scores from the mean, so it is important to know both the mean and the standard deviation.
b. The standard deviation is also a measure of central tendency, so it is important to report this value with the mean.
c. The mean and standard deviation estimate basically the same thing, so these values are typically reported together.
d. This is not true; the standard deviation is rarely reported with the mean.
Answer: A
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