posted by Anonymous on .
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?
Z = (score-mean)/SD
For 2 SD above the mean, Z = +2. Insert the values into the equation and solve for the score.
Marks: --/1 Let data set #2: X=1, 3, 4, 6, 7, 45, 1. Compute the mean of this sample. Round to the hundredth.