The confidence interval at the 95% confidence level for mu(u) was reported to be (69.7, 90.3). Which of the following is a possible 80% confidence interval from the same sample? A. (68.54, 84.12) B. (66.07, 93.93) C. (73.42, 86.57)  D. (78.66, 92.34)

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The confidence interval at the 95% confidence level for mu(u) was reported to be (69.7, 90.3). Which of the following is a possible 80% confidence interval from the same sample?

A. (68.54, 84.12)

B. (66.07, 93.93)

C. (73.42, 86.57) 

D. (78.66, 92.34)

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