41. To insure that she obtained a sufficiently large number of minority responde

Question

41. To insure that she obtained a sufficiently large number of minority respondents in a study of racial attitudes, a researcher divided the people in her population into four racial groups. She then drew a random sample from each of these groups. What kind of sample is this?  

a. cluster sample  

b. simple random sample   

c. quota sample   

d. stratified random sample

42. An industrial psychologist obtained a list of the 859 employees in a large company. He numbered the employees from 001 to 859, then used a table of random numbers to choose a sample of 100 employees. What kind of sample did he select?

a. stratified random sample  

b. cluster sample   

c. systematic sample

d. simple random samp

Explanation / Answer

d. stratified random sample because the population is divided into groups with similar attributes

d. simple random sample since event has equal probability of selection

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