Sample mean computed on a sample size of 64 in a statistical test is 20. Given a confidence level of 95% and a known var

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answerhappygod
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Sample mean computed on a sample size of 64 in a statistical test is 20. Given a confidence level of 95% and a known var

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Sample mean computed on a sample size of 64 in a statistical test is 20. Given a confidence level of 95% and a known variance of 4, the confidence intervals are:

19,21
18,22
19.5,20.5
18.5,21.5
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