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The cost of a university education has increased at a much faster rate than costs in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average number of hours students work per week exceeds 20. A random sample of 20 students was selected and the following values were observed:

-The correct null and alternative hypotheses are

Question

Consider the following to answer the question(s) below:
The cost of a university education has increased at a much faster rate than costs in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average number of hours students work per week exceeds 20. A random sample of 20 students was selected and the following values were observed:

-The correct null and alternative hypotheses are

Quizplus · Accepted Answer

The null hypothesis should always be the statement we are testing, which in this case is that the average number of hours students work is equal to 20. The alternative hypothesis should be the opposite of the null hypothesis, which in this case is that the average number of hours students work is greater than 20. Therefore, the correct choice is A.

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