Homework Help: statistics

Posted by Anonymous on Friday, September 30, 2011 at 11:07am.

The distribution score for a city wide math test scores results in a mean of 70 and a standard deviation of 12. What score is 2 standard deviations above the mean?

statistics - Anonymous, Friday, September 30, 2011 at 11:23am
94
statistics - PsyDAG, Friday, September 30, 2011 at 1:31pm
Z = (score-mean)/SD

For 2 SD above the mean, Z = +2. Insert the values into the equation and solve for the score.
statistics - Anonymous, Friday, March 2, 2012 at 1:38pm
Question 2
Marks: --/1 Let data set #2: X=1, 3, 4, 6, 7, 45, 1. Compute the mean of this sample. Round to the hundredth.

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