A population data set has a mean of 81 and a standard deviation of 5.2. Find...
A population data set has a mean of 81 and a standard deviation of 5.2. Find the z-scores for each of the following. Round to the nearest hundredth.
(a) x = 74
(b) x = 85
Homework Answers
Solution :
(a)
x = 74
z = (x - 
) / 
= (74 - 81) / 5.2 =
-1.35
(b)
x = 85
z = (85 - 81) / 5.2 = 0.77
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