Compute the critical value $z_{\alpha/2}$ that corresponds to a 99\% level of confidence.
Added by Harry W.
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Step 1
We know that the level of confidence is 99%, which means that the area in the tails of the standard normal distribution is 0.01 (since the total area under the curve is 1 and the confidence interval is split evenly between the two tails). Show more…
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