In Exercise 10.81, you conducted a non-pooled t-test to decide whether the mean number of acute postoperative days spent in the hospital is smaller with the dynamic system than with the static system. Use the technology of your choice to perform the following tasks.
a. Using a pooled t-test, repeat that hypothesis test.
b. Compare your results from the pooled and non-pooled t-tests.
c. Which test do you think is more appropriate, the pooled or non-pooled t-test? Explain your answer.