If the average weight of fish caught for the day is 36 pounds with a 4 point deviation, what is the probabilty that if 30 fishermen were checked the average weight would be less than 31.5?
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Expert's answer
2011-07-21T05:43:02-0400
As the deivation is known, we use one-tailed z-test: z = (X - μ)/(σ / √ n) = (31.5 - 36)/ (4/ √30) = 6.02
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