Chapter 2.1, Problem 18P

For Problems 15-20, use the specified number of classes to do the following.

(a) Find the class width.

(b) Make a frequency table showing class limits, class boundaries, midpoints, frequencies, relative frequencies, and cumulative frequencies.

(c) Draw a histogram.

(d) Draw a relative-frequency histogram.

(e) Categorize the basic distribution shape as uniform, mound-shaped symmetric, bimodal, skewed left, or skewed right.

(f) Draw an Ogive.

(g) Interpretation Discuss some of the features about the data that the graphs reveal. Consider items such as data range, location of the middle half of the data, unusual values, outliers, etc.

Archaeology: New Mexico The Wind Mountain excavation site in New Mexico it animportant archaeological location ofthe ancient Native American Anasazi culture. The following data represent depths (in cm) below surface grade at which significant artifacts were discovered at this site (Reference: A. I. Woosley and A. J.McIntyre. MimbresMogollomArchaeology. University of New Mexico Press). Note: These data are also available for download at the Companion Sites for this text.

85	45	75	60	90	90	115	30	55	58
78	120	80	65	65	140	65	56	30	125
75	137	80	120	15	45	70	65	50	45
95	70	70	28	40	125	105	75	80	70
90	68	73	75	55	70	95	65	200	75
15	90	46	33	100	65	60	55	85	50
10	68	99	145	45	75	45	95	85	65
65	52	82

Use seven classes.