A dishwasher has a mean lifetime of 12 years with an estimated standard deviation of 1.25 years. Assume the lifetime of a dishwasher is normally distributed. Round the probabilities to four decimal places. It is possible with rounding for a probability to be 0.0000. a) State the random variable. Select an answer b) Find the probability that a randomly selected dishwasher has a lifetime of 10.35 years or more. c) Find the probability that a randomly selected dishwasher has a lifetime of 10.85 years or less. d) Find the probability that a randomly selected dishwasher has a lifetime between 10.35 and 10.85 years. e) Find the probability that randomly selected dishwasher has a lifetime that is at most 8.875 years. f) is a lifetime of 8.875 years unusually low for a randomly selected dishwasher? Why or why not? Select an answer g) What lifetime do 79% of all dishwashers have less than? Round your answer to two decimal places in the first box. Put the correct units in the second box.

A dishwasher has a mean lifetime of 12 years with an estimated standard deviation of 1.25 years. Assume the lifetime of a dishwasher is normally distributed. Round the probabilities to four decimal places. It is possible with rounding for a probability to be 0.0000. a) State the random variable. Select an answer b) Find the probability that a randomly selected dishwasher has a lifetime of 10.35 years or more. c) Find the probability that a randomly selected dishwasher has a lifetime of 10.85 years or less. d) Find the probability that a randomly selected dishwasher has a lifetime between 10.35 and 10.85 years. e) Find the probability that randomly selected dishwasher has a lifetime that is at most 8.875 years. f) is a lifetime of 8.875 years unusually low for a randomly selected dishwasher? Why or why not? Select an answer g) What lifetime do 79% of all dishwashers have less than? Round your answer to two decimal places in the first box. Put the correct units in the second box.

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.CR: Chapter 13 Review

Problem 61CR

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