Question

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Radon: The Problem No One Wants to Face" is the title of an article appearing in Consumer Reports. Radon is a gas emitted from the ground that can collect in houses and buildings. At certain levels it can cause lung cancer. Radon concentrations are measured in picocuries per liter (CVL), Aradon level of 4 pCVL is considered acceptable." Radon levels in a house vary from week to week. In ond house, a sample of weeks had the following readings for radon level (in PCI/L). 1.9 2.6 5.7 5.1 1.9 9 3.9 6.8 (a) Find the mean, median, and mode. (Round your answers to two decimal places.) mean median mode (b) Find the sample standard deviation, coefficient of variation, and range (Round your answers to two decimal places.) range (c) Based on the data, would you recommend radon mitigation in this house? Explain. No, since the average and median values are both under acceptable ranges. Yes, since the median value is over "acceptable" ranges, although the mean value is not Yes, since the average value is over "acceptable" ranges, although the median value is not Yes, since the average and median values are both over 'acceptable" ranges.

Answer 1

Here 1.9 2.6 n=8 5.7 5.1 1.9 g 3.9 6.8 ascending 5.1 X asorder 1.9 1.9 2.6 1.9 15.7 2.6 -3.9 5.1 9 9.7 3.9 6.8 6.8 7 36.9 x- 7 -2.7125 2.0125 1.0875 0.4875 -2.7125 4.3875 -0.7125 2.1875 (x-x)? 87.35765625 4.05015625 1.18 265625 0,23765625 7.35765625 19.2501563 0.50765625. 4.78 S15625 44.72875 1.9 x= 36.9 = 4.6125 8 median a fost the item = (a ) tos to item Mode = most repeated value=log Mediah = {(93th +(6) *3 2 = 3.9+5.9 -9.8.419 2 2 Median 4.9 is = {(xi-x)² = 44.72875 - 5.59109375 = 2.36 5=2.36454938 Is=2.36

Page cv = Sd x 100 = 2.36 mean 4.6125 S1.1653 cv = sl.17.1., Range = max namber-min number Range = 9-1.9 Range = 7.)) Option 4 is correct. j.e. Yes, since the average and median values are both over acceptable ranges. a Mean & 4.6125 Median = 4.9 Mode = 1.9 s = 2.36 CV - 5l.17). Tange = 7.1