What is the confidence level of each of the following confidence intervals for 元土1.96 a. 元士1.645 b. 元士2.575 С. エ士1.28 d. 正土.99 e. 12 The mean and standard deviation of a random sample of n measurements are equal to 33.9 und 3.3, respectively. 100. a. Find a 95% confidence interval for / if n = b. Find a 95% confidence interval for / if n 400.

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