The following data represent trunk circumferences (in mm) for a random sample of 60 4-year-old apple trees at East Mailing Agriculture Research Station in England (Reference: S. C. Pearce, University of Kent at Canterbury). Note: These data are also available for download at the Companion sites for this text.

(a) Make a stem and leaf display of the tree circumference data.
(b) Make a frequency table with seven classes showing class limits, class boundaries, midpoints, frequencies, and relative frequencies.
(c) Draw a histogram.
(d) Draw a relative-frequency histogram.
(e) Identify the shape of the distribution.
(f) Draw an ogive.
(g) How are the low frequencies shown in the histogram reflected in the steepness of the lines in the ogive?

108 99 106 102 5 120 120 17 122 142 106 11 119 109 125 108 116 105 117 123 103 114 0 99 120 108 91 115 109 114 105 99 122 106 113 114 75 96 124 91 102 108 10 83 90 69 117 84 142 122 113 105 112 7 122 129 100 138 117