Задача N5721 теория вероятностей объем выборки

5721. Assuming a normal population with σ=3 sec., determine the minimum amount of testing that needs to be carried out so that, with a reliability of γ=0.9, the accuracy of estimating the general average processing time of a part is δ=1 sec.

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