Manufacturers were subdivided into groups by volume of sales. Those with more than $100 million in sales were classified as Class A large; those from $50 to
$100 million as Class A medium size; and those between $25 and $50 million, and so on. Samples were then selected from each of these groups. What is this type of sampling called?
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A. B. C. D. E.A
This is stratified random sampling. It is a method of selecting a random item from each section of the population. The randomness comes from the random selection from a particular section. Stratified refers to the division of the sections.