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  • Card 17 / 25:
    Terri Vogel, an amateur motorcycle racer, averages 129.71 seconds per 2.5 mile lap (in a seven-lap race) with a standard deviation of 2.28 seconds. The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps.

    In words, define the random variable X .X ~ _____(_____,_____)Find the percent of her laps that are completed in less than 130 seconds.The fastest 3% of her laps are under _____.The middle 80% of her laps are from _______ seconds to _______ seconds.

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Source:  OpenStax, Introductory statistics. OpenStax CNX. May 06, 2016 Download for free at http://legacy.cnx.org/content/col11562/1.18
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