Given that mean time between failure data is normally distributed we find that car batteries last on average 4.5 years (54 months), with a standard deviation of 4 months. What is the probability that we sample a single battery at random that lasts fewer than 47 months?
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We are given that the mean time between failure (MTBF) data is normally distributed with a mean of 54 months and a standard deviation of 4 months. Show more…
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It is known that automobile batteries have a mean life of 54 months and a population standard deviation of 6 months. A random sample of 50 batteries has been purchased. What is the probability that the mean battery life for the sample is 52 or fewer months?
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