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
Epidemiologists look for the causes of disease, such as toxic waste and industrial pollution, at the
Projected Ethnic Changes in U.S. Population to 2050
Bell Curve for Intelligence IQ scores for a population-based sample usually fall into this kind of
Population size
Some Cases of Population Aging
Simplified Motor Score