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Question1: The industry standards suggest that eleven percent of new vehicles require warranty service within the 1st year. Jones Nissan in Sumter, South Carolina, sold 9 Nissans yesterday. (Give your answers to four decimal places.)

[A] The probability that none of these vehicles requires warranty service is...

[B] The probability exactly one of these vehicles requires warranty service is...

[C] The probability that exactly two of these vehicles require warranty service is...

[D] Compute the mean and standard deviation of this probability distribution.

Mean µ =...

Standard deviation σ =...

Question2: It is estimated that 0.42 percent of the callers to the Customer Service department of Dell, Inc. will receive a busy signal. What is the probability that of today's 1,000 callers at least 5 received a busy signal? [Give your answer to four decimal places.]

Question3: Suppose that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,275 per hour and a standard deviation of $235. Calculate the operating cost for the lowest three percent of the airplanes? (Round z value to two decimal places. Omit the "$" sign in your response.]

Reference no: EM13357503

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