If a researcher notices that several measures are highly correlated, what could be done to reduce risk of Type I error?

When compared to people with an external locus of control, people with an internal locus

of control are more likely to a. give up before obtaining a goal. b. exercise regularly and quit smoking. c. attribute failure to bad luck. d. blame others for setbacks. e. experience oral fixation.

If the doctor wants to detect a heartbeat, he or she should wait until the

A) zygotic stage. B) germinal stage. C) fetal stage. D) embryonic stage.