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Let X = the number of dropped calls experienced per day by customers of a particular cell phone provider. This random v

Let X = the number of dropped calls experienced per day by customers of a particular cell phone provider. This random variable is . Measurable Discrete Continuous A failure Indeterminate. 10.

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Let X = the number of dropped calls experienced per day by customers of a particular cell phone provider. This random v

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  1. Let X = the number of dropped calls experienced per day by customers of a particular cell phone provider. This random variable is • Measurable • Discrete • Continuous • A failure • Indeterminate 10

  2. Let Y = the number of dropped calls experienced per day by customers of a particular cell phone provider. Y has the following probability distribution:What is the expected number of dropped calls per day? • 0 • 0.5 • 0.65 • 2.0 • 1.5 10

  3. Let Y = the number of dropped calls experienced per day by customers of a particular cell phone provider. Y has the following probability distribution:What is the standard deviation of dropped calls per day? • 1.15 • 0.853 • 0.652 • 2.0 • 1.5 10

  4. X and Y are independent random variables with expected values and standard deviations as shown.What is E(X – Y)? • 92 • 68 • 34 • 83 10

  5. X and Y are independent random variables with expected values and standard deviations as shown.What is SD(X – Y)? • 9 • 15 • 11.62 • 135 • 12.37 10

  6. In North Carolina, heights of HS boy basketball players have mean 74 inches and standard deviation 4.5 inches, while girl players have a mean height of 70 inches and standard deviation 3 inches. At a mixed 2-on-2 tournament teams are formed by randomly pairing boys with girls as teammates.On average, how much taller do you expect the boy to be? • 4” • 2” • 7.5” • 1.5” • 3” 10

  7. In North Carolina, heights of HS boy basketball players have mean 74 inches and standard deviation 4.5 inches; girl players have a mean height of 70 inches and standard deviation 3 inches. At a mixed 2-on-2 tournament teams are formed by randomly pairing boys with girls as teammates.What is the standard deviation of the difference in the heights of a boy and girl on a 2-person team? • 1.5“ • 7.5” • 5.4” • 2.25” • 4” 10

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