An inactive substance, such as a sugar pill or a saline injection, that is given to subjects to make them think they've taken a drug is called a(n)
a. placebo.
b. extraneous variable.
c. dependent variable.
d. control drug.
ANSWER: a
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If sample variance is computed by dividing SS by df = n – 1, then the average value of the sample variances from all possible random samples will be _______ the population variance
a. smaller than c. approximately equal to b. larger than d. unrelated to
A fertilized egg cell is called a(n)
a. teratogen. b. zygote. c. fetus. d. embryo. e. placenta.
How much alcohol, if any, can a pregnant woman drink without worrying about the negative effects on her child?
a. The equivalent of two cocktails a day b. The equivalent of one beer a day c. Anything less than what causes her to appear drunk d. Unknown, and therefore abstention is recommended
Which of the following is not an assumption of the one-way repeated measures ANOVA? a. The data are interval-ratio in scale
b. The underlying distribution is normally distributed. c. The variances among the populations being compared are homogeneous. d. The groups are independent.