In a two-factor between-subjects analysis of variance, the interaction of two independent
variables is reflected in the remaining deviation of a _____ mean from a _____ mean after the
main effects of each independent variable have been
removed.
a. main effect; grand
b. main effect; treatment group
c. cell; grand
d. cell; main effect
C
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In the United States, ____ percent of people over age 65 report a functional limitation of some kind
a. 10 b. 20 c. 30 d. 40
Strayer and Johnston were investigating the link between cell phone use and the ability to react to environmental stimuli. While the participants tracked a moving target using a joystick, they were required to press a button each time a red light flashed at random points on a computer screen. While completing the task, one group used a hand-held cell phone to carry on a conversation, one group
used a hands-free cell phone, and one group was not engaged in any conversation. The researchers measured the time that elapsed between the appearance of the red light and the button press. The results from this study suggested that compared to the group that was not engaged in any conversation, people engaged in a cell phone conversation: a. detected the red light each time it was present, but were slower to react to the red light b. failed to detect the red light more often, but had equally quick reaction times when the red light was detected c. only showed slower reactions times if they were using a hand-held cell phone d. failed to detect the red light more often, and were slower to react to the red light when it was detected
In the 1950s, the community health movement replaced the use of asylums
Indicate whether the statement is true or false
Spina bifida and anencephaly
a. can be cured by minor surgical procedures. b. are both genetic disorders. c. are both neural tube defects. d. have increased in frequency over the last twenty years.