Summing the deviation score of each observation value (that is, its difference from the mean) and then dividing by the sample size (n) computes the:
A) variance.
B) average deviation.
C) standard deviation.
D) mean squared deviation.

Question

Quizplus · Accepted Answer

When we sum the deviation score of each observation value (that is, its difference from the mean) and then divide by the sample size (n), we get the average deviation. This measure tells us how far, on average, each observation is from the mean. It is not the variance, standard deviation, or mean squared deviation, which are all different measures of variability.

Summing the Deviation Score of Each Observation Value (That Is