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QUESTION
The lifetimes of a certain type of automobile battery are normally distributed with a mean of 5.9 years and a standard deviation of 0.4 years. The...
The lifetimes of a certain type of automobile battery are normally distributed with a mean of 5.9 years and a standard deviation of 0.4 years. The batteries are guaranteed to last at least 5 years. What proportion of the batteries fail to meet the guarantee?
