SOLUTION: I'm having a bit of trouble on this and it's giving me gray hairs! Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The or

Question 1050288: I'm having a bit of trouble on this and it's giving me gray hairs!
Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 4.75 hours with a sample standard deviation of 2.0. Conduct a hypothesis test, the Type I error is:
a. to conclude that the current mean hours per week is higher than 4.5, when in fact, it is higher
b. to conclude that the current mean hours per week is higher than 4.5, when in fact, it is the same
c. to conclude that the mean hours per week currently is 4.5, when in fact, it is higher
d. to conclude that the mean hours per week currently is no higher than 4.5, when in fact, it is not higher
Help is greatly appreciated!
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Need to Know:
Type I Error involves the rejection of a null hypothesis that is actually true
Ho: μ = 4.5
Ha: μ > 4.5
b. to conclude that the current mean hours per week is higher than 4.5 (rejecting Ho)
when in fact, it is the same
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