SOLUTION: A national magazine claims that the average college student watches less television than the general public. The national average is 30 hours per week, with a standard deviation of

Question 1180475: A national magazine claims that the average college student watches less television than the general public. The national average is 30 hours per week, with a standard deviation of 1.5 hours. A sample of 40 college students has a mean of 26 hours. Alpha=0.05. Find H0 and H1. Is there enough evidence to reject the claim?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Ho: mean is > =30 hr.
H1: mean is < 30 hr.
alpha=0.05 p{reject Ho|Ho true}
test stat is a z, critical value is z<-1.645.
calculation z=(26-30)/1.5/sqrt(40)=-4/0.2372=-16.9
strongly reject Ho with p-value <<0.0001 (really 0), but I usually stop at 0.0001.
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