Question

7.57 Online communication. A study suggests that the average college student spends 10 hours per week communicating with others online. You believe that this is an underestimate and decide to collect your own sample for a hypothesis test. You randomly sample 60 students from your dorm and find that on average they spent 13.5 hours a week communicating with others online. A friend of yours, who offers to help you with the hypothesis test, comes up with the following set of hypotheses. Indicate any errors you see. H0 :x ̄<10hours HA : x ̄ > 13.5 hours

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Clarabelle

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college student spends 10 hours per week communicating with others online.
You believe that this is an underestimate or you believe college student spends more than 10 hours per week communicating with others online.
the null hypothesis and the alternative hypothesis is H_0 : \mu =10 H_a : \mu > 10

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