A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
Help plz!! Math.... - PsyDAG, Thursday, October 13, 2011 at 11:47am
Z = (score-mean)/SD
SD^2 = variance
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.
Help plz!! Math.... - Jennifer, Thursday, October 13, 2011 at 12:50pm
I apologize...thank you....so is it
A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0