Question

Coal is cariad fram a mina in West Virginia to a powar plant in New York in happar cars an a lang train. The automatic hopper car loader i tons and starndard deviationo 0.8 ton. coal into cach car. The actual weights of coal loaded into cach car ara narmaly distributod, with mean cat to nu tons (a) What is the probability that one car chosen t random will have less than 70.5 tons of coal? (Round your answer to four decimal places.) (b) what is the probability that 37 cars chosen t random will have a mean load waight x of less than 70.5 tons of coal? (Round your answer to four decimal placas. ) rwas less than 70,5 tons, Would that fact make vou suspect that the loader had slipped t of adjustment? (e) Suppose e weight of coal in one Yes No verage x of less than 70.5 tons. Would that fact make you suspect that the loader had slipped out of adiustment? Why? Yes, the preobability that this deviation is random is very large. No, the probability that this deviation random very small. No, the probability that this deviation is randomn is very large.

Answer 1

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