Certified Advanced Alcohol and Drug Counselor (CAADC) Practice Exam

Question: 1 / 400

Before you can determine the standard deviation, you must calculate which of the following?

Median

Mode

Variance

Mean

To determine the standard deviation, it is necessary to calculate the mean first. The mean is the average of a set of values and serves as the center point around which the data points will be analyzed. Standard deviation measures the amount of variability or dispersion of a set of data points relative to the mean.

Once the mean has been established, you can then compute the variance by finding the average of the squared differences from the mean. After obtaining the variance, the standard deviation is simply the square root of the variance. This sequential relationship highlights the importance of calculating the mean prior to determining the standard deviation, as it directly influences the resulting measure of variability in the data.

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