Задача N5548 теория вероятностей доверительный интервал

5548. x̅=25.92, n=144, σ=3, γ=0.95 Standard deviation σ=3 of a normally distributed random variable X, sample mean x̅v=25.92 and sample size n=144 are given. Find the confidence interval for estimating the unknown mathematical expectation a with a confidence probability γ=0.95.

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