Advanced Placement (AP), 18.03.2021 01:00 kkruvc

What approximate confidence level C was used to construct a C% confidence interval for the population mean with a sample size of 25 and a sample standard deviation of 3, if the interval is (23.9, 26.1)? A. 94%
B. 90%
C. 91%
D. 93%
E. 92%

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What approximate confidence level C was used to construct a C% confidence interval for the populatio...