Defective rods: A grinding machine used to manufacture steel rods produces rods, 5% of which are defective. When a customer orders 1000 rods, a package of 1060 rods is shipped. with a guarantee that at least 1000 of the rods are good. What is the probability that a pad-cage of 1060 rods contains 1000 or more that are good?
Answer to relevant QuestionsIs it normal? Is it reasonable to treat the following sample as though it comes from an approximately normal population? Explain. Lightbulbs: The lifetime of lightbulbs has a mean of 1500 hours and a standard deviation of 100 hours. A sample of 50 lightbulbs is tested. a. What is the probability that the sample mean lifetime is greater than 1520 ...Explain how to decide when it is appropriate to use the normal approximation to the binomial distribution. Build more parking? A survey is to be conducted in which a random sample of residents in a certain city will be asked whether they favor or oppose the building of a new parking structure downtown. How many residents should ...Contaminated water: Polychlorinated biphenyls (PCBs) are a group of synthetic oil- like chemicals that were at one time widely used as insulation in electrical equipment and were discharged into rivers. They were discovered ...
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