Terri Vogel, an amateur motorcycle racer, averages 129.24 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.29 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( 12.9.24 x 2.29 b. Find the proportion of her laps that are completed between 129.66 and 131.81 seconds. 0.2972 X c. The fastest 4% of laps are under | 125.23 X seconds. d. The middle 50% of her laps are from | 127.70 X seconds to 130.78 x seconds. Hint: Helpful videos: Find a Probability ) [+] Finding a Value Given a Probability ) [+] Hint Question Help: Message instructor Submit