Manufacturers were subdivided into groups of volumes of sales.Those with more th

Question

Manufacturers were subdivided into groups of volumes of sales.Those with more than $100 million in sales were classified as ClassA - large; those from $50 to $100 million as Class A - medium; andthose between $25 to $50 million... and so on. Samples were thenselected from each of these groups. What is this type of samplingcalled? a. Simple sampling b. Stratified random sampling c. Panel sampling d. Convenience sampling e. none of the above Manufacturers were subdivided into groups of volumes of sales.Those with more than $100 million in sales were classified as ClassA - large; those from $50 to $100 million as Class A - medium; andthose between $25 to $50 million... and so on. Samples were thenselected from each of these groups. What is this type of samplingcalled? a. Simple sampling b. Stratified random sampling c. Panel sampling d. Convenience sampling e. none of the above

Explanation / Answer

B. Stratified Random Sampling A method of sampling, which involves the division of apopulation into smaller groups, known as strata. A random samplefrom each stratum is then taken, in a number proportional to thestratum's size when compared to the population. These subsets ofthe strata are then pooled to form a random sample.

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