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For example x = 45 find and s = 5. 

(a)  Find the value of x corresponding to z-score z = 3.8

 x = x + sz = 45 + (3.8)5 = 64

(b)  Find the value of x corresponding to z-score z =  ̶ 0.2

 x = x + sz = 45 + ( ̶ 0.2)5 =44

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