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The mean return of Bartlett Co. is 3% and the standard deviation is 6% based on 20 monthly returns. What is the respective standard error of the sample and the confidence interval of a two tailed z-test with a 5% level of significance? A. 2.00; 0.37 to 5.629. B. 1.34; 0.37 to 5.629. C. 1.34; −0.66 to 4.589. |