[All Steps] The life of a certain light bulb averages 1000 hours with a standard deviation of 75 hours. What is the probability that a randomly selected
Question: The life of a certain light bulb averages 1000 hours with a standard deviation of 75 hours. What is the probability that a randomly selected bulb lasts:
- from 950 to 1050 hours?
- from 900 to 1100 hours?
- from 850 to 1150 hours?
- from 800 to 1200 hours?
- from 750 to 1250 hours
Look at your answers a to e. What pattern do you see? What happens as the interval increases in size? Explain why. Is the increase in probability linear? Why?
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