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January 27, 2015

January 27, 2015

Posted by **rebecca** on Thursday, August 30, 2012 at 6:58pm.

- statistics -
**MathMate**, Thursday, August 30, 2012 at 7:11pmZ-score = (X-μ)/σ

=(75-60)/15

=1

Look up normal distribution tables to find P(Z≥1)=0.8413

So 15.87% of students have better scores than 75%.

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