34. In order to predict whether a certain set of random sample scores could possibly be part of a given population, the researcher could use:
a. the z score equivalents of each sample score
b. the percentile equivalents of each sample score
c. the one-sample t test
d. the interdecile range
35. The distribution of differences is composed of the differences between:
a. raw scores and the mean
b. the highest and lowest scores in distribution
c. the standard deviation and the standard error of the mean
d. pairs of randomly selected sample means
36. When all samples are drawn from a single population, the mean of the distribution of differences should approximate:
a. 0
b. +1.0
c.-1.0 d. the mean of the distribution of means
37. If the mean of the distribution of differences was to equal -6.00, this would indicate that:
a. the standard deviation of the distribution is a function of the range
b. the samples probably represent different populations
c. the samples were probably selected from a single population
d. none of these, since the mean can never equal zero
38. Whenever the mean of the distribution of differences equals zero, then one can be fairly safe in concluding that:
a. the samples probably represent a single population
b. the samples probably represent different populations
c. there was absolutely no sampling error
d. actual standard score