Question

alting Chapter 3: Do problems on p. 131 (Chapter Review) #4. pp. 131 (Chapter Review) #4 4. Consumer: Radon Gas "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 (pci/L). A radon level of 4 pci/L is considered acceptable."Radon levels in a house vary from week to week. In one house, a sample of 8 weeks had the following readings for radon level (in pCi/L): (16pts. Total) 1.9 2.8 5.7 4.2 1.9 8.6 3.9 7.2 (a) Find the mean, median, and mode. (6pts.) (b) Find the sample standard deviation, coefficient of variation, and range. (10pts.) Solution: * = Ex: s2 = E(x-)? Ex-_-2 n-1 is? ; S = Vs2; CV = n-1 -10096

Answer 1

classmate Date Page Answer' from the given data x= Mean - 36.2 4.525 Exi h 8 Medran : The Middle value of the data tog, 1.9,2.8 3.9,4.2,5.7.7.2,8.6 Median 4th obsht sth obsh = 3.9+4.2 2 4.05 2 Mode Most frequent observation 1.9 variance = 6.056 I cxi-x 3 n-l standard deviation variance = 6.056 S = 2.46098 Coefficient of variation = 2.46098 x 100% 4.5225 0.5438 X 100 % 54.38% GON CS Scanned with CamScanner