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Normal distribution with population mean

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A salesman who frequently drive from Los Angeles to San Diego finds that his driving time is a random variable (×) having roughly a normal distribution with population mean = 2.3 hours and population standard deviation = 0.2 hours.

A. Find the probability that such a trip will take more than 2.4 hours.

B. Below what value(number of hours) are the fastest 25% of his trips? P(×<b) =0.25, b?

Reference no: EM132409043

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