Terri Vogel, an amateur motorcycle racer, averages 129.06 seconds per 2.5 mile lap (in a 7 lap race) with a standard dev

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Terri Vogel An Amateur Motorcycle Racer Averages 129 06 Seconds Per 2 5 Mile Lap In A 7 Lap Race With A Standard Dev 1 (23.2 KiB) Viewed 34 times

Terri Vogel, an amateur motorcycle racer, averages 129.06 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.27 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 129.06 2.27 b. Find the proportion of her laps that are completed between 127.77 and 130.25 seconds. 0.78445 c. The fastest 3% of laps are under d. The middle 80% of her laps are from seconds. seconds to seconds.