Showing 11 to 20 of 104 Questions
  • 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 viola....

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    165
  • 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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    389
  • 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 b....

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    252
  • 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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    156
  • 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 wi....

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    329
  • A manufacturing company uses an acceptance scheme on production items before they are shipped. The plan is a two-stage one. Boxes of 25 are readied for shipment and a sample of 3 is tested for defectives. If any defectives are found, the entire box is sent back for 100%....

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    425
  • A nationwide survey of 17,000 seniors by the University of Michigan revealed that almost 70% disapprove of daily pot smoking. If 18 of these seniors are selected at random and asked their opinions, what is the probability that more than 9 but less than 14 disapprove of ....

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    419
  • A nationwide survey of seniors by the University of Michigan reveals that almost 70% disapprove of daily pot smoking, according to a report in Parade. If 12 seniors are selected at random and asked their opinion, find the probability that the number who disapprove of sm....

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    645
  • A production process produces electronic component, parts. It has presumably been established that the probability of a defective part is 0.01. During a test of this presumption, 500 items are sampled randomly and 15 defective out of the 500 were observed.(a) What is yo....

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    361
  • A production process produces items in lots of 50. Sampling plans exist in which lots are pulled aside periodically and exposed to a certain type of inspection. It is usually assumed that the proportion defective in the process is very small. It is also important to the....

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    146