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KiPLEX manufactures plastic pipes. KiPLEX piping is a less expensive alternative to copper piping. BPLEX's marketing department wants to determine plumbers' satisfaction with KiPLEX piping. To do this, they plan to survey plumbers who purchase KiPLEX pipes on regular basis.
-Suppose that there are five categories of plumbers (individuals, small local businesses, home renovation companies, condo renovation companies, and high rise construction companies). The marketing specialists decide to randomly select 20 individuals from each category. This sampling method is called
A) simple random.
B) stratified.
C) cluster.
D) systematic.
E) convenience.

Question

Quizplus · Accepted Answer

The sampling method described is stratified sampling because the population (plumbers who purchase KiPLEX pipes) is divided into five categories (strata) and a random sample is taken from each category. This allows for a more representative sample by ensuring that each category is represented in the sample.

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