When determining the pooled population variance estimate in a t test for independent means:
A) the variance of at least one of the original populations must be known (as opposed to estimated), but the other can be estimated from sample scores
B) the variance of BOTH of the original populations must be known, as opposed to estimated
C) the estimates based on each of the samples are averaged in such a way as to give more influence to the estimate based on more participants
D) the scores from both samples are combined to form a single sample, and the estimated variance is figured in the usual way, but using this combined sample
C
You might also like to view...
How does social support relate to the concept of social networks?
A. Social support and social networks are not related to one another. B. Social support tends to come from those outside our social networks. C. When our social networks break down, we search for social support. D. Social support tends to come from our social networks.
________ occurs when one or more roles are contradictory.
a. Role strain b. Role conflict c. Achieved status d. Ascribed status
Sociologists argue that environmental problems are not necessarily related to social problems.
Answer the following statement true (T) or false (F)
Which of the following statements about social roles is correct?
A. The roles that belong to a social status are always performed in the same manner. B. Social roles are always performed in the same manner by those holding ascribed, but not achieved, statuses. C. Actual performance of a role varies from individual to individual. D. Role expectations and actual role performances never vary.