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A random sample of 121 motorcycles on highway 111 showed an average speed of 65 mph. It is known that the standard deviation of all motorcycle speeds is 22 mph If the confidence level were changed

A random sample of 121 motorcycles on highway 111 showed an average speed of 65 mph. It is known that the standard deviation of all motorcycle speeds is 22 mph. If the confidence level were changed from 96.6% as it was in the previous question to 90%, the margin of error

Apr 03 2020 View more View Less

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