The percentage values on the z score table are only valid when
a. the z scores are positive
b. the raw score mean equals 50
c. the raw score mean is greater than 50
d. the distribution is normal
Question 2When using the experimental method, the final goal is to test the
hypothesis of
a. difference
b. association
c. both of these
d. neither of these
Questions 67 through 72 will be bases on the following study:
A researcher wishes to test whether the drug, magnesium pemoline, has any
influence on intelligence. Two groups of subjects are randomly selected from
the population of Omega University students. Group A is given the magnesium
pemoline and then tested on the Stanford-Binet IQ test. Group B is given a
placebo and, then, also tested on the Stanford-Binet. Both groups are tested
under identical environmental conditions.
Question 3In a within-groups ANOVA,
a. participants are randomly assigned to conditions.
b. a two-tailed test is always conducted.
c. participants across conditions are related in some way.
d. the same people are tested under every condition.
Question 4The z test may be used to determine
a. if the sample is representative of a known population
b. if a sample contains bias
c. the exact amount of sampling error contained in the parameter mean
d. the amount of sampling error contained in the population's standard
deviation
Question 5The z score table always gives, as a direct read-out, the percentage of
cases falling
a. between a given z score and the mean
b. below a negative z score
c. above a positive z score
d. none of these
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