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Classify the hypothesis test as two-tailed,left-tailed,or right-tailed. At one school, the average amount of time that tenth-graders spend watching television each week is 20.8 hours.

Classify the hypothesis test as two-tailed,left-tailed,or right-tailed.

At one school, the average amount of time that tenth-graders spend watching television each week is

20.8

hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased from the previous mean of

20.8

hours.

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