SOLUTION: A statistical analysis of 1,000 long-distance telephone calls made by a company indicates that the length of these calls is normally distributed, with a mean of 270 seconds and a
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Question 1189194: A statistical analysis of 1,000 long-distance telephone calls made by a company indicates that the length of these calls is normally distributed, with a mean of 270 seconds and a standard deviation of 30 seconds. What is the length of a call if only 1% of all calls are shorter? Answer by Boreal(15235) (Show Source):
