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Posted by on Sunday, February 24, 2013 at 9:17pm.

In a normal distribution with mu = 25 and sigma = 3, what number corresponds to z = -3?
is it 16, 18, or 20

  • statistics - , Monday, February 25, 2013 at 4:43pm

    Formula:

    z = (x - mean)/sd

    Plug in the numbers you know from the problem:

    -3 = (x - 25)/3

    Solve for x.

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