Statistics

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The weight of a bag of corn chips is normally distributed with a mean of 22
ounces and a standard deviation of 0.5 ounces.
-The probability that a bag of corn chips weighs more than 21 ounces is?
-The probability that a bag of corn chips weighs between 20.75 and 23.25
ounces is?

  • Statistics -

    z = (21-22)/.5

    z = -2
    1-.0062 = .9938

    z = (20.75-22//.5
    z = -2.5

    z =( 23.25-22)/.5
    z = 2.5
    .9938-.0228 = .9710

  • Statistics -

    Statistics - Kuai, Sunday, October 27, 2013 at 8:55pm
    z = (21-22)/.5

    z = -2
    1-.0228 = .9710

    z = (20.75-22//.5
    z = -2.5

    z =( 23.25-22)/.5
    z = 2.5
    .9938-.0062= .9876

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