5442. x̅=11, n=30, σ=8. Find the confidence interval for estimating with reliability γ=0.97 the unknown mathematical expectation a of a normally distributed feature X of the general population, if the general standard deviation σ=8, the sample mean x̅v=11 and the sample size n=30.

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