Q2. Hospital stays. The U.S. National Center for Health Statistics compiles data on the length of stay by patients in short-term hospitals and publishes its findings in Vital and Health Statistics. A random sample of 21 patients yielded the following data on length of stay, in days.
4 4 12 18 9 6 12
3 6 15 7 3 55 1
10 13 5 7 1 23 9
a) Determine the mean, median, and mode
b) Determine the interquartile range
c) Obtain the five number summary
d) Identify potential outlier, if any
e) Determine the variance and standard deviation