Posted by Christine on Sunday, May 16, 2010 at 8:55pm.
assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use the 689599.7 rule to find the following quantities:
a. percentage of scores greater than 120

statistics  Christine, Sunday, May 16, 2010 at 9:02pm
would the percentage of scores greater than 120 be 4.865 or 4.87

statistics  PsyDAG, Monday, May 17, 2010 at 3:55pm
Z = (120100)/20 = 20/20 = +1
Of the 50% higher than the mean, Z = +1 gives you
50  1/2(68) = 50  34 =?

statistics  Anonymous, Friday, February 5, 2016 at 1:28pm
16
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