Showing 11 to 20 of 195 Questions
  • A company generally purchases large lots of a certain kind of electronic device. A method is used that rejects a lot if two or more defective units are found in a random sample of 100 units.(a) What is the probability of rejecting a lot that is 1% defective?(b) What is the probability of accepting a lot that is 5% defective?

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  • A company is interested in evaluating its current inspection procedure on shipments of 50 identical items. The procedure is to take a sample of 5 and pass the shipment if no more than 2 are found to be defective. What proportion of 20% defective shipments will be accepted?

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  • A couple decides they will continue to have children until they have two males. Assuming that P(male) = 0.5, what is the probability that their second male is their fourth child?

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  • A financial analyst creates the following probability distribution for the performance of an equity income mutual fund.a. Comment on the optimism or pessimism depicted in the analyst’s estimates. b. Convert the above probability distribution to a cumulative probability distribution. c. What is the probability that this mutual fund will

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  • A foreign student club lists as its members 2 Canadians, 3 Japanese, 5 Italians, and 2 Germans. If a committee of 4 is selected at random, find the probability that(a) All nationalities are represented;(b) All nationalities except the Italians are represented.

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    329
  • A government task force suspects that some manufacturing companies are in violation of federal pollution regulations with regard to dumping a certain type of product. Twenty firms are under suspicion but all cannot be inspected. Suppose that 3 of the firms are; in violation.(a) What is the probability that inspection of 5 firms finds no v

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    168
  • A homeowner plants 6 bulbs selected at random from a box containing 5 tulip bulbs and 4 daffodil bulbs. What is the probability that he planted 2 daffodil bulbs and 4 tulip bulbs?

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    394
  • A large company has an inspection system for the batches of small compressors purchased from vendors. A batch typically contains 15 compressors. In the inspection system a random sample of 5 is selected and all are tested. Suppose there arc 2 faulty compressors in the batch of 15.(a) What, is the probability that for a given sample there

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    254
  • A local drugstore owner knows that, on average, 100 people per hour stop by his store.(a) Find the probability that in a given 3-minutc period nobody enters the store.(b) Find the probability that in a given 3-minute period more than 5 people enter the store.

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  • A manufacturer knows that on the average 20% of the electric toasters which lie makes will require repairs within 1 year after they are sold. When 20 toasters are randomly selected, find appropriate numbers x and y such that(a) The probability that at least x of them will require repairs is less than 0.5;(b) The probability that at least

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