A hypothesis test is to be performed. State the null and alternative hypotheses
At one school the average amount of time that tenth graders spend watching television each week is 21.6 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 of time spent watching television per week has decreased
Null hypothesis: The average amount of time that tenth graders spend watching television each week is still 21.6 hours (μ = 21.6).
Alternative hypothesis: The average amount of time that tenth graders spend watching television each week has decreased (μ < 21.6).