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748 CHAPTER 13 NONPARAMETRIC AND DISTRIBUTION-FREE STATISTICS
Peak Inspiratory Nasal Flow Rate (L/min)
Totally Clear Not Very Clear Partially Blocked
170 185 130 150 130 150 170
130 180 160 280 130 120 110
220 115 160 140 170 155 120
250 260 130 100 130 100 85
160 160 135 140 145 140
130 170 130 90
130 115 120 190
150 150 190 130
160 130 170
Source: J. Jose, MS, FRCS. Used with permission.
9. Ten subjects with bronchial asthma participated in an experiment to evaluate the relative effectiveness
of three drugs. The following table shows the change in FEV 1 (forced expired volume in 1
second) values (expressed as liters) 2 hours after drug administration:
Drug
Drug
Subject A B C Subject A B C
1 .00 .13 .26 6 .03 .18 .25
2 .04 .17 .23 7 .05 .21 .32
3 .02 .20 .21 8 .02 .23 .38
4 .02 .27 .19 9 .00 .24 .30
5 .04 .11 .36 10 .12 .08 .30
Are these data sufficient to indicate a difference in drug effectiveness Let a = .05. What is the
p value for this test
10. One facet of the nursing curriculum at Wright State University requires that students use mathematics
to perform appropriate dosage calculations. In a study by Wendy Gantt (A-14), undergraduate
nursing students were given a standardized mathematics test to determine their mathematical
aptitude (scale: 0–100). The students were divided into two groups: traditional college age (18–24
years, 26 observations) and nontraditional ( 25+, eight observations). Scores on the mathematics
test appear in the following table:
Traditional Students’ Scores
Nontraditional Students’ Scores
70 6 88 77
57 79 68 72
85 14 88 54
55 82 92 87
87 45 85 85
(Continued)