Exercise 34 presented the following data on endotoxin concentrationin settled dust both

Chapter 1, Problem 48

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Exercise 34 presented the following data on endotoxin concentrationin settled dust both for a sample of urban homesand for a sample of farm homes:U: 6.0 5.0 11.0 33.0 4.0 5.0 80.0 18.0 35.0 17.0 23.0F: 4.0 14.0 11.0 9.0 9.0 8.0 4.0 20.0 5.0 8.9 21.09.2 3.0 2.0 0.3a. Determine the value of the sample standard deviation foreach sample, interpret these values, and then contrastvariability in the two samples. [Hint: forthe urban sample and for the farm sample, andfor the urban sample and 1617.94 for thefarm sample.]b. Compute the fourth spread for each sample and compare.Do the fourth spreads convey the same message aboutvariability that the standard deviations do? Explain.c. The authors of the cited article also provided endotoxinconcentrations in dust bag dust:U: 34.0 49.0 13.0 33.0 24.0 24.0 35.0 104.0 34.0 40.0 38.0 1.0F: 2.0 64.0 6.0 17.0 35.0 11.0 17.0 13.0 5.0 27.0 23.028.0 10.0 13.0 0.2Construct a comparative boxplot (as did the cited paper) andcompare and contrast the four samples.