Chapter 4: Variance Flashcards
1
Q
How does calculating the sample variance differ from calculating the population variance?
A
The denominator for the sample variance is (n-1), not N
2
Q
A researcher selects a population of eight scores where SS = 72. What is the population variance in this example?
A
sigma^2=9
3
Q
Sum of Squares
A
Sum of the squared deviations of scores from their mean
4
Q
degrees of freedom for sample variance
A
all scores are free to vary except one (n-1)
