Name the sampling method used in each of the following situations by selecting t

Question

Name the sampling method used in each of the following situations by selecting the appropriate letter:

a.           Random           b.         Simple random            c.         Systematic

d.          Stratified          e.         Quota                           f.          Stratified Proportional

g.          Cluster             h.         Convenience               

1) A study was done to determine the age, number of times per week, and the amount of time residents use a local park in San Antonio, Texas.

i) A house in the neighborhood of the park was randomly selected, and then the resident of every eighth house in the neighborhood was interviewed. The sampling method is called:

ii) A block in the neighborhood was randomly selected and all the families living on the block were interviewed. The sampling method is called:

2) A woman in the airport is handing out questionnaires to travelers asking them to evaluate the airport’s services. She asks every 10th traveler, randomly selecting the first person, sitting near a gate and not taking a nap while they are waiting for thei plane to depart. The sampling method is called:

3) The marketing manager for an electronics chain store wants information about the ages of its customers in each of its five stores. At each store location, 100 randomly selected customers are given questionnaires to fill out asking for information about age, as well as about other variables of interest. The sampling method is called:

4)  The librarian at a public library was asked to determine what proportion of library users are children on each of the four floor of the library. The librarian records how many children are in a group of 25 library users on each of the four floor nearst the service desk on that floor. The sampling method is called:

Explanation / Answer

1)

i. Systematic sampling because every kth sampling unit is selected.

ii. Cluster Sampling because whole population is divided in blocks (Clusters). A block (Cluster) is selected randomly and all sampling unit of that cluster is included in the sample.

2) Systematic sampling because every kth sampling unit is selected.

3) Stratified sampling because whole population is divided in stores (strata). 100 customers are randomly selected from each store (stratum) and included in the sample.

4) Quota Sampling

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