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Terri Vogel, an amateur motorcycle racer, averages 129.99 seconds per 2.5 mile lap (in a 7...

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Terri Vogel, an amateur motorcycle racer, averages 129.99seconds per 2.5 mile lap (in a 7 lap race) with a standarddeviation of 2.25 seconds . The distribution of her race times isnormally distributed. We are interested in one of her randomlyselected laps. (Source: log book of Terri Vogel) Let X be thenumber of seconds for a randomly selected lap. Round all answers to4 decimal places where possible. a. What is the distribution of X?X ~ N( , ) b. Find the proportion of her laps that are completedbetween 127.18 and 129.89 seconds. c. The fastest 2% of laps areunder seconds. d. The middle 40% of her laps are from seconds toseconds.

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Solution Given that mean 12999standard deviation 225a The    See Answer
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