4.3 Flashcards
(6 cards)
1
Q
SS sum of the square
A
is the sum of the squared deviation scores
Variance =mean squared deviation = sum of squared deviations/number of scores
2
Q
Computational formula
A
SS= ΣX²- (ΣX)²/N
3
Q
variance
A
variance=SS/N
4
Q
standard deviation
A
=√SS/N
5
Q
population variance
A
is represented by the symbol σ² and equals the mean squared distance from the mean. Population variance is obtained by dividing the sum of squares by N
6
Q
the population standard deviation
A
is represented by the symbol σ and equals the square root of the population variance
