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A pig farm owner recently changed the diet of his pigs and wants to find out the average weight gain of the pigs in the

A pig farm owner recently changed the diet of his pigs and wants to find out the average weight gain of the pigs in the new diet over the span of 4 weeks. How many pigs should he sample so that he is 95% confident that the average weight of a pig falls within 2 lbs if the standard deviation is 15.6 lbs?

Answers:

A)405

B)234

C)16

D)15.3

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