<PRE><B>Question 1079027</B>
standard error(SE) = 3 / square root(28) = 0.5669
:
alpha(a) = 1 - (80/100) = 0.20
p* = 1 - a/2 = 0.90
:
critical value(CV) is determined by finding in the z-tables the z-score associated with p*, CV = 1.28
:
margin of error(ME) = CV * SE = 1.28 * 0.5669 = 0.7256
:
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