Chapter 4 - Variability Flashcards
0
Q
Define deviation!
A
Deviation is distance from the mean.
1
Q
Define variability!
A
Variability provides a quantitative measure of the differences between scores in a distribution and describes the degree to which the scores are spread out or clustered together.
2
Q
Define population variance!
A
Population variance equals the mean squared deviation. Variance is the average squared distance from the mean.
3
Q
Define Standard deviation!
A
Standard deviation is the square root of the variance and provides a measure of the standard, or average, distance from the mean.
4
Q
Name of the two formulas for some of squares:
A
Definitional formula and computational formula
5
Q
Computational formula for sum of squares:
A
V
