By subtracting the mean from the original score and dividing the resulting number by the standard deviation for that group of scores, you have converted this original score to a
a. median score.
b. intermediate range.
c. z-score.
d. percent variance.
C
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What is the difference between small for date babies and premature babies?
A. Small for date babies are full term. B. Small to date babies are extremely short in length. C. Premature babies are born after their due date. D. Premature babies are bigger than small to date babies.
One reason for preferring randomization to matching for establishing group equivalence is that
a. randomization involves more confounding. b. we do not know all the relevant variables to match. c. counterbalancing does not require randomization. d. randomization guarantees group equivalence.
Which one of the following is not a threat to the internal validity of an experiment?
a. maturation b. regression effect c. random error d. mortality
As part of a classroom demonstration, your teacher is reading you a list of digits to test your memory span. If you are like most individuals, you will probably recall somewhere in the range of ________ items
a. one to two b. three to five c. five to nine d. ten to twenty