(Solved): Classify the hypothesis test as two-tatled, left-tailed, or right-tailed. At one school, the averag ...

Classify the hypothesis test as two-tatled, left-tailed, or right-tailed. At one school, the average amount of time that tenth-graders spend watching television each week is \( 20.9 \) 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 \( 20.9 \) hours. Left-tailed Two-talled Right-tailed