Showing 11 to 20 of 455 Questions
  • (a) Find the mean and variance in Exercise 5.64 of the random variable X representing the number of persons among 2000 that die from the respiratory infection.(b) According to Chebyshev's theorem, there is a probability of at least 3/4 that the number of persons to die among 2000 persons infected will fall within what interval?

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    313
  • (a) Find the mean and variance in Exercise 5.65 of the random variable X representing the number of persons among 10,000 who make an error in preparing their income tax returns.(b) According to Chebyshev's theorem, there is a probability of at least 8/9 that the number of persons who make errors in preparing their income tax returns among

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    251
  • (a) In Exercise 5.9, how many of the 15 trucks would you expect to have blowouts?(b) According to Chebyshev's theorem, there is a probability of at least 3/4 that the number of trucks among the next 15 that have blowouts will fall in what interval?

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  • (a) Suppose that you throw 4 dice, probability that you get at least one 1. Find (b) Suppose that you throw 2 dice 24 times. Find the probability that you get at least one (1, 1), that is, you roll "snake;-eyes." [Note: The probability of part (a) is greater than the probability of part (b).]

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    252
  • (Use computer) Assume that X is a hyper-geometric random variable with N = 50, S = 20, and n = 5. Calculate the following probabilities.a. P(X = 2)b. P(X ≥ 2)c. P(X ≤ 3)

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    9
  • A basketball player is fouled while attempting to make a basket and receives two free throws. The opposing coach believes there is a 55% chance that the player will miss both shots, a 25% chance that he will make one of the shots, and a 20% chance that he will make both shots.a. Construct the appropriate probability distribution.b. What i

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    70
  • A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n independent trials of the experiment. n = 10, p = 0.4, x = 3

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  • A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n independent trials of the experiment. n = 15, p = 0.85, x = 12

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  • A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n independent trials of the experiment. n = 40, p = 0.99, x = 38

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  • A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n independent trials of the experiment. n = 50, p = 0.02, x = 3

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