Certified Advanced Alcohol and Drug Counselor (CAADC) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Certified Advanced Alcohol and Drug Counselor Exam. Practice with flashcards and multiple choice questions, each offering hints and thorough explanations. Get prepared for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

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

Median
Mode
Variance
Mean

The correct answer is: 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.