Answer the following by using the z-table from class. The life of a 9-volt battery is normally distributed with a mean of l = 2000 hours and a standard deviation of o = 40 hours. What is the proportion of batteries with an average life of 2100 hours or more? (enter answer as a percent rounded to the nearest hundredth as needed)

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Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

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A: Note: Hey, since there are multiple subparts posted, we will answer first three subparts. If you…

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Q: Suppose that the annual rainfall in Ferndale, California, is known to be normally distributed, with…

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Q: A doctor measured serum HDL levels in her patients, and found that they were normally distributed…

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