Problem N5609 probability theory confidence interval
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- From a large batch of electric lamps, 100 were randomly selected. The average duration of lamp burning in the sample turned out to be 1000 hours. Find with reliability γ = 0.95 a confidence interval for the average duration a of lamp burning in the entire batch, if it is known that the standard deviation of the duration lamp burning σ=40 h and the duration of lamp burning is distributed according to the normal law.
Additional information
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)