Homework Help: statistics

Posted by Kcr7 on Tuesday, August 28, 2012 at 2:32pm.

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

statistics - MathGuru, Tuesday, August 28, 2012 at 7:12pm
Use z-scores.

Formula:
z = (x - mean)/sd

Your data:
x = 30
mean = 15
sd = square root of the variance

I'll let you take it from here.

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