Задача N5628 теория вероятностей доверительный интервал

5628. A survey of 400 workers of one enterprise was carried out and it was found that the average wage of workers is 190 rubles. Determine with reliability 0.9544 the possible limits of workers´ wages, considering the distribution of workers´ wages as normal with a standard deviation of 60 rubles.

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