Solution.
Given that,
= 30
= 6.4
a.Given that
z = -1.5
Using z score formula,
x = z +
x = -1.5 × 6.4 + 30 = 20.4
Data value is 20.4
b.Given that
z = 1.6
Using z score formula,
x = z +
x = 1.6 × 6.4 + 30 = 40.2
Data value 40.2
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