question archive With domestic sources of building supplies running low several years ago, roughly 60,000 homes were built with imported Chinese drywall
With domestic sources of building supplies running low several years ago, roughly 60,000 homes were built with imported Chinese drywall
Subject:MathPrice: Bought3
With domestic sources of building supplies running low several years ago, roughly 60,000 homes were built with imported Chinese drywall. According to the article "Report Links Chinese Drywall to Home Problems" (New York Times, Nov. 24, 2009), federal investigators identified a strong association between chemicals in the drywall and electrical problems, and there is also strong evidence of respiratory difficulties due to the emission of hydrogen sulfide gas. An extensive examination of 51 homes found that 41 had such problems.
Suppose these 51 were randomly sampled from the population of all homes having Chinese drywall.
Does the data provide strong evidence for concluding that more than half of all homes with Chinese drywall have electrical/environmental problems? Carry out a test of hypotheses using a 1% significance level.
