The mean and standard deviation of a population are 200 and 20, respectively. What is the probability of selecting one data value less than 190?
A. 42%
B. 58%
C. 31%
D. 69%

When the variances of the population distribution and the sampling distribution of means are compared, the:
A. variances have the same degrees of freedom.
B. population variance is larger than the sampling distribution variance.
C. population variance is smaller than the sampling distribution variance.
D. variances are equal.