Which one of the two mitigation systems given in the table is most efficient in

Question

Which one of the two mitigation systems given in the table is most efficient in mitigating radon concentration in the houses among the years considered? SSD - 2009 SSD/SMD - 2008 SSD - 2008 SSD/SMD - 2009 The total emission rate of the VOC sources in a house is 3 g/sec. Assuming that the external doors and windows of the house are closed and airtight, what is the approximate total VOC concentration inside the house at the end of 8 hours? (House dimensions: 230ft times 150 ft times 12ft) 737 mu g/m^3 20800 mu g/m^3 7370000 mu g/m^3 2080000 mu g/m^3

Explanation / Answer

14.

SE = standardeviation/ sqrt(n), where n is sample size.

SSD in 2008 has the least mitigating system as it has the lowest SE.So option C is the answer. Here' are the SE calculated:

A 0.57 B 0.45 C 0.27 D 1.24

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