The time it takes Jessica to bicycle to school is normally distributed with the mean 15 minutes and variance 4. Jessica has to be at school at 8:00 am. Assume you saw her at class, and she said it took her 23 minutes to get to school that day. Which of following is reasonable inference or conclusion?
a. Twenty-three minutes to school isn't an unusually long commute time.
b. A commuting time of 23 minutes is highly unusual or atypical.
c. The distribution of commute times may not be normal with mean 15 minutes and standard deviation 2 minutes.
d. Both (b) and (c) are feasible conclusions.
e. Both (a) and (c) are feasible conclusions.