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A company produces batteries. The lifetime of all the batteries in the company is a normal distribution with mean58 hours and standard deviationhours. Suppose you
- A company produces batteries. The lifetime of all the batteries in the company is a normal distribution with mean58 hours and standard deviationhours. Suppose you are the quality control manager of this battery company. On each day, you need to select a sample ofbatteries. The sample mean is, and you findapproximately follows a normal distribution with standard deviation 2 hours.
(a) What is the sample size?
(b) ComputeP(x<60)
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