When the population variance or standard deviation is not known, you must use a t statistic instead of a z-score for a hypothesis test
Indicate whether the statement is true or false
T
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Why is it difficult to establish cause and effect in research studies on drug use during pregnancy?
A. The effects might not be seen until after birth, requiring a longitudinal study. B. People who abuse drugs tend to have poor health practices in other domains. C. The effects of most drugs wear off once the child is born. D. Effects of drugs are quite small and difficult to detect.
The bystander effect does not tend to occur when the bystanders are
a. all friends. b. all strangers. c. only in one's mind. d. on the Internet.
Private acceptance of a belief tends to be facilitated by ____ rather than by ____
a. informational influence; normative influence b. normative influence; informational influence c. pluralistic ignorance; diffusion of responsibility d. diffusion of responsibility; pluralistic ignorance
Ritualistic behavior is ____ in young children
a. nonexistent b. uncommon c. common d. difficult to observe