Finding Standard Deviation of Normal Distribution
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A work-study engineer times a certain operation, and discovers that the average time it takes is 10 minutes, but on 15% of occasions it takes more than 13 minutes. Assuming that times for the operation follow a normal distribution, what is its standard deviation?
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Solution Summary
Solution explains the steps in finding standard deviation of a normal distribution with the help of standardized normal distribution tables.
Solution Preview
Look at the normal distribution table. the z value for 15% probability to the right side is ...
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