<PRE><B>Question 507484</B>
1. 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 
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standard deviation = sqrt(36) = 6
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z(30) = (30-15)/6 = 15/6 = 2.5
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Cheers,
Stan H.
stanbon@comcast.net</PRE>