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# Find the mean, variance, and standard deviation of the number of cars sold per day, using the probability distribution in problem 3–4. problem 3–4 An automobile dealership records the number of cars sold each day. The data are used in calculating the following probability distribution of daily sales a. Find the probability that the number of cars sold tomorrow will be between two and four (both inclusive). b. Find the cumulative distribution function of the number of cars sold per day. c. Show that P(x) is a probability distribution.

Find the mean, variance, and standard deviation of the number of cars sold per day, using the probability distribution in problem 3–4.

problem 3–4

An automobile dealership records the number of cars sold each day. The data are used in calculating the following probability distribution of daily sales a. Find the probability that the number of cars sold tomorrow will be between two and four (both inclusive).

b. Find the cumulative distribution function of the number of cars sold per day.

c. Show that P(x) is a probability distribution.

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