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A 95% confidence interval for a population mean is determined to be 100 to 120. A....

A 95% confidence interval for a population mean is determined to be 100 to 120. A. Multiple Choice. What is the sample mean? a) 100 b)110 c)120 d)Not enough information to determine B. What is the margin of error? a)5 b)10 c)20 d) 100 e) Not enough information to determine C. IF the conflidence level is reduced to 90%, which of the following is a viable option for the limits of the interval? a) (85,135) b) (85,130) c) (105,115) d) (105,125) e) none of the above

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