5436. x̅=2000, n=5, σ=40. Find the confidence interval for estimating with reliability γ=0.95 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=40, the sample mean x̅v=2000 and the sample size n=5.

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