Answer
Yes. We can state with 90% confidence that the mean graduation time is between 4.319 years and 4.841 years. Thus the value of "4 years" is not an accurate representation of the mean.
Work Step by Step
It is certain that some college graduates have taken 4 years to complete a bachelor’s degree. However, we see from this study that 4 years is on the short side and the mean graduation time is longer by another 3-10 months.
