SOLUTION: An 80% Confidence is being created for the population proportion. Find the Critical z value (z* is the notation in our book)

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Question 1055200: An 80% Confidence is being created for the population proportion. Find the Critical z value (z* is the notation in our book)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi , Previously Posted:

invNorm( .80 + (1-.80)/2) = invNorm( .80 + .10) = invNorm(.90) = 1.2816

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CI =	z = value

80%     z = 1.282

90%	z =1.645

92%	z = 1.751

95%	z = 1.96

98%	z = 2.326

99%	z = 2.576

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