4. an organizational psychologist measures levels of job satisfaction in a sample of 30 participants. to
measure the variance of job satisfaction, it is calculated that the ss = 120 for this sample.
a. what are the degrees of freedom for the variance?
n= degrees of freedom (df): value - 1
the degrees of freedom of an estimate of variance is equal to n-1
the "n” refers to the number of observations
formula:
1) sample size of n = 30 / value or ss/n = variance
2) ss = 120/30 = 4 (df)
3) 30-1= 29 degrees of freedom