One feature that distinguishes stratified samples from quota samples is that with stratified sampling elements are selected __________ while with quota sampling elements are selected __________.
a. statistically, deterministically
b. probabilistically, judgmentally
c. judgmentally, probabilistically
d. probabilistically, randomly
e. empirically, deterministically
Question 2You know that consumers with high incomes show a much greater variability in their consumption of a given good than those with low incomes. What type of sample would produce the most efficient estimate of the average consumption per individual?
a. Simple random sample
b. Disproportionate stratified sample
c. Proportionate stratified sample
d. Quota sample
e. Systematic sample
Question 3A stratified sample where the strata are sampled based upon their size and variability is a __________ sample.
a. disproportionate
b. proportionate
c. cluster
d. probability
e. random
Question 4The criteria that need to be balanced when choosing a disproportionate stratified sample are
a. strata size.
b. strata heterogeneity.
c. strata variances on the variable of interest.
d. Both a and b.
e. a, b, and c.
Question 5With proportionate stratified sampling, the number of elements selected from each stratum
a. is in direct proportion to the relative number of elements in each stratum in the population.
b. is in direct proportion to the relative variability of the characteristic in each stratum in the population.
c. varies directly with the heterogeneity of each stratum.
d. varies directly with the homogeneity of each stratum.
e. None of the above.
Question 6A researcher decides to use two strata from a population of size N=100, where 60 elements belong to Stratum A and 40 to Stratum B. To obtain her sample of size n=20, the researcher randomly selects 12 elements from Stratum A and 8 elements from Stratum B. Which of the following best describes the resulting sample?
a. Proportionate stratified sample
b. Simple random sample
c. Quota stratified sample
d. Disproportionate stratified sample
e. Homogeneous stratified sample
Question 7One indication of homogeneity within strata is the
a. size of the stratum's sample mean.
b. size of the overall sample mean.
c. number of elements within each stratum.
d. weights used to calculate the overall variance of estimate.
e. size of the standard error of estimate by stratum.
Question 8When stratifying the population, the characteristics should be as
a. close in value as possible within each strata.
b. far apart in value as possible between any two strata.
c. far apart in value as possible within each strata.
d. Both b and c.
e. Both a and b.