Hint_Exercises_Chapter4_17-2-20.docx - 1 The time it takes...

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1)The time it takes to assemble a children's bicycle by a parent has been shown to benormally distributed with a mean equal to 295 minutes with a standard deviationequal to 45 minutes. Given this information, what is the probability that it will take arandomly selected parent between 300 and 340 minutes? 2)Let X be a normal distribution with the mean of 4 and the variance of 9. Find thevalue of x such that P(x < X < 7) = 0.5. 3) If the time it takes for a customer to be served at a fast-food chain business is thoughtto be uniformly distributed between 3 and 8 minutes, a)what is the probability that the time it takes for a randomly selected customer will beless than 5 minutes?b) Find amount of time in which 95% of customers are served. 4)The manager of a computer help desk operation has collected enough data to

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