Задача N5616 теория вероятностей доверительный интервал

5616. In control tests of n = 16 lamps, 3000 hours were determined. Assuming that the lamp life is normally distributed from 20 hours, determine the width of the confidence interval for the general average with a reliability of 0.97.

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