Homework Help: Stats

Posted by Jennifer on Saturday, October 15, 2011 at 12:41pm.

A set of 50 data values has a mean of 15 and a variance of 36.

Find the standard score of a data value = 30

Stats - PsyDAG, Saturday, October 15, 2011 at 12:57pm
Use Z equation.

Variance = SD^2
Stats - Jennifer, Saturday, October 15, 2011 at 3:24pm
V = 30^2 = 900??
Stats - PsyDAG, Sunday, October 16, 2011 at 11:26pm
Go the opposite direction. If variance = SD^2, then SD = √variance.
Stats - Jennifer, Sunday, October 16, 2011 at 11:53pm
so the SD = 30??

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