A life test for a large number of "D" type alkaline batteries revealed that the average duration for a specific use before failure was 19 hours. The distribution of the durations approximates a normal distribution with a standard deviation of 1.2 hours. 

What is the duration such that the duration of 10% of the batteries is greater than this?

Answer rating: 100% (QA)

Solution The duration such that 10 of the batteries is greater than this is Mean 19 hours Standard D... View the full answer