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(a) What is the probability that one car chosen at random will have less than 72.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 31 cars chosen at random will have a mean load weight x of less than 72.5 tons of coal? (Round your answer to four decimal places.) (c) Suppose the weight of coal in one car was less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Yes No Suppose the weight of coal in 31 cars selected at random had an average x of less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Why? Yes, the probability that this deviation is random is very small. Yes, the probability that this deviation is random is very large. No, the probability that this deviation is random is very small. No, the probability that this deviation is random is very large. eed Help? Read It Watch it O O O

(a) What is the probability that one car chosen at random will have less than 72.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 31 cars chosen at random will have a mean load weight x of less than 72.5 tons of coal? (Round your answer to four decimal places.) (c) Suppose the weight of coal in one car was less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Yes No Suppose the weight of coal in 31 cars selected at random had an average x of less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Why? Yes, the probability that this deviation is random is very small. Yes, the probability that this deviation is random is very large. No, the probability that this deviation is random is very small. No, the probability that this deviation is random is very large. eed Help? Read It Watch it O O O

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 73 tons of coal into each car. The actuai weights of coal loaded into each car are normally distributed, with mean u = 73 tons and standard deviation a = 1.4 ton. A USE SALT (a) What is the probability that one car chosen at random will have less than 72.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 31 cars chosen at random will have a mean load weight x of less than 72.5 tons of coal? (Round your answer to four decimal places.) (c) Suppose the weight of coal in one car was less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Yes O No Suppose the weight of coal in 31 cars selected at random had an average x of less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Why? Yes, the probability that this deviation is random is very small. Yes, the probability that this deviation is random is very large. No, the probability that this deviation is random is very small. No, the probability that this deviation is random is very large. Need Help? Read It Watch It
Transcribed Image Text:Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 73 tons of coal into each car. The actuai weights of coal loaded into each car are normally distributed, with mean u = 73 tons and standard deviation a = 1.4 ton. A USE SALT (a) What is the probability that one car chosen at random will have less than 72.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 31 cars chosen at random will have a mean load weight x of less than 72.5 tons of coal? (Round your answer to four decimal places.) (c) Suppose the weight of coal in one car was less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Yes O No Suppose the weight of coal in 31 cars selected at random had an average x of less than 72.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Why? Yes, the probability that this deviation is random is very small. Yes, the probability that this deviation is random is very large. No, the probability that this deviation is random is very small. No, the probability that this deviation is random is very large. Need Help? Read It Watch It
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