Задача N5546 теория вероятностей доверительный интервал

5546. x̅=25.82, n=16, σ=2. The standard deviation σ=2 of a normally distributed random variable X, the sample mean x̅v=25.82, and the sample size n=16 are given. Find the confidence interval for estimating the unknown mathematical expectation a with a given confidence probability γ=0.95.

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)