Terri Vogel, an amateur motorcycle racer, averages 129.69 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.25 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N(,)b. Find the proportion of her laps that are completed between 127.93 and 130.17 seconds. c. The fastest 4% of laps are under  seconds.d. The middle 60% of her laps are from  seconds to  seconds.

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Terri Vogel, an amateur motorcycle racer, averages 129.69 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.25 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible.

a. What is the distribution of X? X ~ N(,)

b. Find the proportion of her laps that are completed between 127.93 and 130.17 seconds. 

c. The fastest 4% of laps are under  seconds.

d. The middle 60% of her laps are from  seconds to  seconds. 

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