__________ are cash or in-kind benefits such as food stamps and low-interest college loans that are given by the government directly to individuals

A researcher wishes to survey the opinions of science teachers in the United States about science policy. He/she gives the questionnaire to all the biology teachers in the Denver high schools. What is the sample in this study?

A) High school teachers in Denver. B) Biology teachers in Denver high schools. C) Science teachers in the United States. D) Science teachers in Denver high schools.

The advantage of a stratified random sample over a random sample is that

A) stratified random samples require less work than random samples. B) stratified random samples are more likely to represent accurately a population, because stratification on key variables virtually assures accurate representation on those variables. C) the random sample is not a probability sample. D) stratified random samples provide both a probability and a nonprobability sample in one procedure.