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For the following spreadsheet, which of the following Excel formulae would calculate the lower (bottom) value of the 90% confidence interval H 1 2 Mean

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For the following spreadsheet, which of the following Excel formulae would calculate the lower (bottom) value of the 90% confidence interval H 1 2 Mean 56 3 Size 80 4 Sample Standard Deviation 9.6 5 Confidence Level of 90% 6 Bottom value of CI 7 8 O =CONFIDENCE.T(15,14,13) O =12-(CONFIDENCE.T(1-15,14,13)) O =+12-(CONFIDENCE.NORM(1-15,14,13)) O =(CONFIDENCE.T(1-15,14,13))

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