Question: A study of the effects of smoking on sleep patterns is conducted. The measure observed is the time, in minutes, that it takes to fall asleep. These data are obtained:

non-smokers 28.6 25.1 26.4 34.9 29.8 28.4 38.5 30.2 30.6 31.8 41.6 21.1 36.0 37.9 13.9

smokers 69.3 56.0 22.1 47.6 53.2 48.1 52.7 34.4 60.2 43.8 23.2 13.8

a) Display the values for each group by ordered arrays (i.e. in sorted order)

b) Calculate the following statistics for each group:

c) Create a box and whisker, and dot plot diagram
(if you don't have PHStat you could draw by hand or other means)

d) create a histogram

e) comment on what kind of impact smoking appears to have on the time required to fall asleep.