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Math Help - Probability

  1. #1
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    Probability

    Hi....Can anyone help me?/?

    The weights of bags of potting mix from a production line approximate a normal distribution with an average weight of 25.11 kgs and a standard deviation of 1.48 kgs. In what interval is the middle 85% of bag weights contained? State the upper limit for this interval only correct to 2 decimal places.



    Thank you!!!!!!!!!!!!!!!!
    Last edited by sky_sa35; September 13th 2007 at 12:12 AM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by sky_sa35 View Post
    Hi....Can anyone help me?/?

    The weights of bags of potting mix from a production line approximate a normal distribution with an average weight of 25.11 kgs and a standard deviation of 1.48 kgs. In what interval is the middle 85% of bag weights contained? State the upper limit for this interval only correct to 2 decimal places.



    Thank you!!!!!!!!!!!!!!!!
    If I told you that an 85% interval for a standard normal random variable is approximatly:

    [-1.44, 1.44]

    would that help?

    RonL
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