The Cost of a College Education Has Increased at a Much

Multiple Choice

The cost of a college 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 hours students work per week exceeds 20. To test this at a significance level of 0.05, a random sample of n = 20 students was selected and the following values were observed: Based on these sample data, which of the following statements is true?

A) The standard error of the sampling distribution is approximately 3.04.
B) The test statistic is approximately t = 0.13.
C) The research hypothesis that the mean hours worked exceeds 20 is not supported by these sample data.
D) All of the above are true.