2.3.5 The following table shows the number of hours 45 hospital patients slept following the administration of a certain anesthetic. 7 10 12 4 8 7 3 8 5 12 11 3 8 1 1 13 10 4 4 5 5 8 7 7 3 2 3 8 13 1 7 17 3 4 5 5 3 1 17 10 4 7 7 11 8

(a) From these data construct: A frequency distribution A relative frequency distribution A histogram A frequency polygon

(b) Describe these data relative to symmetry and skewness as discussed in Exercise 2.3.1, part h.