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In a large city, you pick a sample of 30 of lawn mowings during summer.Thestandard deviationis known to be6.3.The margin of error for a 90%

In a large city, you pick a sample of 30 of lawn mowings during summer.Thestandard deviationis known to be6.3.The margin of error for a 90% confidence interval will be?

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