Question: 1.(Confidence interval for given 2) Determine the confidence interval [1, 2],0.95 with confidence level = 0.95 for the mean of a normal distribution with variance

1.(Confidence interval for given 2) Determine the confidence interval [1, 2],0.95 with confidence level = 0.95 for the mean of a normal distribution with variance 2 = 4, using a samples of n = 400 values with sample mean x = 3.

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