Dispersion Flashcards
1
Q
Deviance/Error
A
Distance of each score from the Mean
2
Q
Sum of Squared Errors (SS)
A
Total amount of error in the mean
Errors/variances are squared before adding them up (because some are negative)
3
Q
Variance
A
Average distance of scores from the mean
Tells us how widely dispersed scores are around mean
SS/Number of scores
4
Q
Standard deviation
A
Square root of the Variance
Variance converted back to original units of measurement of scores used to compute it
Large = data spread widely around mean
5
Q
Interquartile Range
A
Middle 50% of scores
