The probability of rejecting the null hypothesis when it is true is called:
a. alpha.
b. beta.
c. power.
d. 1 ? beta.
A
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Danielle, a college senior, is trying to remember the names of the classmates that attended her high school graduation party but cannot. It is most likely that
a. she never transferred the information from short-term to long-term memory. b. the memory of the party has been written over by new information. c. the memory of the party has been displaced from long-term memory by newer information. d. she has not yet found the cues that will help her retrieve the information from long-term memory.
In a set of incomes in which most people are in the $15,000 through $40,000 range, which measure of central tendency would be most disturbed by an income of $1 million?
a. mode b. median c. mean d. frequency
Cara says that she has just begun to experience some intense emotions whereas her neighbor, Craig, says that he doesn't experience any of these emotions. Which of the following is likely to be TRUE?
A. Cara is in early adolescence; Craig is in late adolescence. B. Cara is in late childhood; Craig is in middle adolescence. C. Both Cara and Craig are in early adolescence. D. Both Cara and Craig are in middle childhood.
Which of the following statements is false?
a. Longitudinal studies are relatively simple to conduct. b. Cross-sectional studies collect data of different groups of people at the same time. c. A benefit of longitudinal studies is that researchers can collect data on the same people over time. d. Cross-sectional studies cannot separate the effects of age and generation.