The population variance is defined as the sum of the _____ .
a. squared differences of each score from the sample mean of a distribution divided
by the sample size
b. differences of each score from the mean of a population divided by the
population size
c. squared differences of each score from the mean of a population divided by the
population size
d. differences of each score from the mean of a population divided by the
population size minus one
Question 2
For the class interval of 20-25, the lower real limit is _____ .
a. 19.5
b. 20.0
c. 19.0
d. 20.5
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