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Find the critical value zc necessary to form a confidence interval at the level of confidence shown below. c=0.95
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Find the critical value zc necessary to form a confidence interval at the level of confidence shown below.

c=0.95

User Basma
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I think this is the correct answer: * Zc x (sigma/sqrt of n)
c= .95 (Zc of 1.96)
0.711*
User James Coote
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