Testing for radon in your home

Radon and Your Health

Testing Instructions – Radon.com

A sample of 12 radon detectors of a certain type was selected, and each was exposed to 100 pCi / L of radon. The resulting readings were as follows: 105.6 90.9 91.2 96.9 96.5 91.3 100.1 105.0 99.6 107.7 103.3 92.4 a. Does this data suggest that the population mean reading under these conditions differs from 100 ? State and test the appropriate hypotheses using α=.05. b. Suppose that prior to the experiment, a value of σ=7.5 had been assumed. How m