Inferential statistics are based on the assumption that the selection of cases is based on
a. probable sampling techniques.
c. both answers
b. non-probable sampling techniques.
d. neither answer
Ques. 2A researcher can
guarantee the representativeness of the sample by
a. using stratified random sampling.
b. employing simple random sampling procedures.
c. using systematic sampling procedures.
d. using the whole population.
Ques. 3If
not all members of a population have a non-zero chance of being selected for a sample, then
a. the sample may not be representative of the population.
b. there is a risk of inappropriately generalizing results beyond the sample.
c. the sample has been chosen using nonprobability sampling.
d. All of these are true.
Ques. 4If your professor is only interested in the test performance of students in her class, the class is her
a. Pppulation.
c. biased sample.
b. random sample.
d. non-probability sample.
Ques. 5A negative
z score is always
a. above the median.
b. below the median.
c. a good score.
d. a poor score.
e. below the mean.
Ques. 6The sum of the
z-scores squared in any distribution is equal to
a. zero.
c. cN.
b. 1.00.
d. N
2.
Ques. 7The mean of all
z-scores in a distribution is equal to
a. zero.
b. number in the distribution.
c. the sum of all squared scores.
d. the sum of all squared
z-scores divided by N.
Ques. 8The Pearsons
r is not appropriate when the data are
a. from a population.
c. bivariate.
b. heterogeneous.
d. curvilinear.
Ques. 9The denominator of the Smith and Glass effect size is
a. the standard deviation of the control group.
b. the difference between means.
c. a weighted estimate of the population mean based on the means of both groups.
d. a weighted estimate of the population standard deviation based on the variability within both groups.
Quick Reply
