You 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 2
A 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
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