1.31 Determine an appropriate interval width for a random sample of 370 observations that fall between and include each of the following:

a. 30 to 75

b. 40 to 200

c. 50 to 240

d. 180 to 400 1.32 Consider the following data:

17 62 15 65 28 51 24 65 39 41 35 15 39 32 36 37 40 21 44 37 59 13 44 56 12 54 64 59

a. Construct a frequency distribution.

b. Construct a histogram.

c. Construct an ogive.

d. Construct a stem-and-leaf display.