B. Directions: Read each problem carefully, and choose the best answer. Place th

Question

B. Directions: Read each problem carefully, and choose the best answer. Place the answer in the blank provided. __________

(14.) The 50 states in the U.S. were numbered alphabetically and a researcher decided to select all states beginning with the letters “N” and “W” to survey these states on unemployment rates. What type of sampling technique is the researcher employing? A. stratified B. random C. cluster D. systematic __________

(15.) A psychology teacher taught a large lecture class of 200 beginning psychology students. She wanted to calculate the average on her first examination by selecting every eighth students’ test scores and finding the average of these scores. What type of sampling technique is this psychology teacher utilizing? A. stratified B. random C. cluster D. systematic __________

(16.) A pollster wanted to determine how much support a new library tax would have in a major metropolitan area. He divides the metro area into 5 regions, SE, SW, NE, NW, and Central and surveys 100 voters for each of these regions. What type of sampling technique is the pollster using? A. stratified B. random C. cluster D. systematic __________

(17.) Which of the following is not a basic sampling technique? A. systematic B. cluster C. random D. Monte Carlo __________

(18.) Which of the following techniques is a correct way to get a random sample? A. asking a question by radio and having the listeners call in their answers. B. asking people to respond by mail C. asking the “person on the street” D. using random numbers to select the sample

Explanation / Answer

14. Cluster, Cluster sampling refers to a sampling method wherein the members of the population are selected at random, from naturally occurring groups called 'cluster'.
All the individuals are taken from randomly selected clusters.

15. Systematic, This is a substitute for simple random sampling, where systematically(here every eighth) each element of the sample is selected

16. stratified, Stratified sampling is one, in which the population is divided into homogeneous segments, and then the sample is randomly taken from the segments. Randomly selected individuals are taken from all the strata.

17. Monte Carlo

18. D. using random number to select the sample

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