Question 7 Blood cocaine concentration (mg/L) was determined both for a sample of individuals who had died from cocaine-induced excited delirium (ED) and for a sample of those who had died from a...

Extracted text: Question 7 Blood cocaine concentration (mg/L) was determined both for a sample of individuals who had died from cocaine-induced excited delirium (ED) and for a sample of those who had died from a cocaine overdose without excited delirium; survival time for people in both groups was at most 6 hours. ED: 0.1 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.4 0.5 0.7 0.8 1 1.5 2.7 2.8 3.5 4 8.9 9.2 11.7 21 Non- 0.1 0.1 0.1 0.1 0.2 ED: 0.2 0.2 0.3 0.3 0.3 0.4 0.5 0.5 0.6 0.8 0.9 1 1.2 1.4 1.5 1.7 2 3.2 3.5 4.1 4.3 4.8 5 5.6 5.9 6. 6.4 7.9 8.3 8.7 9.1 9.6 9.9 11 11.5 12.2 12.7 14 16.6 17.8 a. Determine the three quartile values for blood cocaine concentration for both ED and Non-ED samples. b. Construct a comparative boxplot (two boxplots on the same set of axes, one above the other), and use it as a basis for comparing and contrasting the ED and non-ED samples.


Extracted text: Question 6 A study on a range of automotive lubricants reported the following data on oxidation-induction time (min) for various commercial oils: Oxidation-Induction Time: 87 103 130 160 180 195 132 145 211 105 145 153 152 138 87 99 93 119 129 a. Calculate the sample variance and standard deviation for the oxidation-induction time. b. If the observations were converted and displayed in hours, what would be the resulting values of the sample variance and sample standard deviation? Answer without actually performing the conversion.