The Wind Mountain excavation site in New Mexico is an important archaeological location of the ancient Native American Anasazi culture. The following data represent depths (in cm) belown
surface grade at which significant artifacts were discovered at this site (Reference: A.I. Woosley and A.J. McIntyre, Mimbres Mogollon Archaeology, University of New Mexico Press).
115 30
65 140 65 50
15 45 70 65
40 125 105 75
55
100
45
85 45 75 60 90 90
78 120 80 65
75 137 80 120
95 70 70 28
90 68 73 75
15 90 46 33
10 68 99 145
65 52 82
55 58
30 125
50 45
70
80
70 95 65 200 75
65 60 55
85 50
75 45 95
85 65 65 52 82
(a) find the class width
(b) make a frequency table, showing class limits, class, boundaries, midpoint, frequencies, relative frequencies, and cumulative frequencies. (round your relative frequencies to four decimal places.)