Consider the Following to Answer the Question(s) Below

Multiple Choice

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 95% confidence interval is

A) 14.03 to 26.77 hours.
B) 11.69 to 29.11 hours.
C) 15.14 to 25.66 hours.
D) 12.67 to 28.13 hours.
E) 13.63 to 26.37 hours.