to conclude that the mean hours per week currently is no higher than 4.5, when in fact, it is not higher

to conclude that the mean hours per week currently is no higher than 4.5, when in fact, it is not higher

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


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