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Question find the z∗ values based on a standard normal distribution for each of the following. 5.42 (a) An 80% confidence interval for a proportion (b) An 84% confidence interval for a slope (c) A 92% confidence interval for a standard deviation I got A I think, 1.28?

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Question

find the z∗ values based on a standard normal distribution for each of the

following.

5.42  (a)  An 80% confidence interval for a proportion

(b)  An 84% confidence interval for a slope

(c)  A 92% confidence interval for a standard deviation

I got A I think, 1.28?

 
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