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The mean price for a gallon of milk in New Orleans is the highest in the country last year at $4.10. A sample from 25

The mean price for a gallon of milk in New Orleans is the highest in the country last year at $4.10. A sample from 25 different grocery stores in New Orleans this year found the sample mean price per gallon of $4.20.

Assume that the population standard deviation is known to be $0.40 and the population of milk prices is normally distributed.

If the alternate hypothesis states that 4.1, where is the rejection region for the hypothesis test?

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