SOLUTION: what is the critical value zc necessary to form a confidence interval at the given level of confidence 85%
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Question 220856: what is the critical value zc necessary to form a confidence interval at the given level of confidence 85%
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
what is the critical value zc necessary to form a confidence interval at the given level of confidence 85%
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You need 15% evenly divided between two tails.
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I used a TI-84 to find invNorm(0.15/2) = -1.4395
The cv's are +/-1.4395
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Cheers,
Stan H.
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