Auto batteries have an average life of 2.7 years. Battery life is normally distributed with a mean of2.7 years and a standard deviation of .3 year. The batteries are warranted to operate for a minimumof 2 years. If a battery fails within the warranty period, it will be replaced with a new battery at nocharge. The company sells and installs the batteries. Also, the usual $5 installation charge will bewaived.a. What percentage of batteries would you expect to fail before the warranty period expires?

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A:

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A: Mean:The formula for finding mean is shown below:

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.