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Find the mean number of rides for a disney world visitor

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Reference no: EM131426148

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Suppose the number of rides that a visitor enjoyed at Disney World during a day is a random variable with probability distribution given in the table below.

x

5

6

7

8

9

10

11

12

P(x)

0.04

0.07

0.09

0.12

0.20

0.30

0.13

0.05

a. Find the mean number of rides for a Disney World visitor.

b. Find the variance and standard deviation of the number of rides for a Disney World visitor.

c. Find the probability that the number of rides for a randomly selected Disney World visitor is within one standard deviation of the mean. Write a Solution Trail for this problem.

d. Find the probability that the number of rides for a randomly selected Disney World visitor is less than one standard deviation above the mean.

Reference no: EM131426148

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