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 A. The amount of time required for an oil and filter change on an automobile is normally distributed with a mean

of 45 minutes and a standard deviation of 10 minutes. A random sample of 16 cars is selected. 95% of all sample means will fall between what two values?

 B. Salmon weights are bell-shaped, with a mean of 12.3 pounds and standard deviation of 2 pounds. According to the Empirical Rule, approximately 95% of all salmon weigh between what two values?

 

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