The lifespan of 100-Watt light bulbs produced by a certain manufacturer is normally distributed with a mean of 1000 hours and a standard deviation of 80 hours. The sampling distribution for means from samples of size 25 from this population has a mean of 1000 hours and a standard deviation of 16 hours. Suppose you randomly select a sample of 25 bulbs produced by this manufacturer. What is the probability that the mean lifespan of the 25 bulbs is more than 1010 hours?
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The lifespan of 100-Watt light bulbs produced by a certain manufacturer is normally distributed with...
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