SOLUTION: at one school, the average amount of time that tenth-graders spend watching tv each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less

Question 617726: at one school, the average amount of time that tenth-graders spend watching tv each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less tv. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching tv per week has decreased. Formulate the null and alternative hypotheses for the study described.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
at one school, the average amount of time that tenth-graders spend watching tv each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less tv. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching tv per week has decreased. Formulate the null and alternative hypotheses for the study described.
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Ho: u(is) >= 18.4
Ha: u(is) < 18.4 (this is what the principal hopes)
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Cheers,
Stan H.
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