The Environmental Protection Agency (EPA)is Charged with Monitoring the Environment

Essay

The Environmental Protection Agency (EPA)is charged with monitoring the environment.One aspect of this is keeping track of "acid rain," a broad term describing the fall of water through an acidic atmosphere.Acidity is measured on the pH scale, where pure water has a pH of 7.0.Normal rain is slightly acidic because carbon dioxide dissolves into it, and thus has a pH of about 5.5.(A lower pH indicates greater acidity.)Suppose the EPA wishes to determine whether a particular area is subject to acid rain.Let m denote the true average for pH in this area. a)What is the appropriate null hypothesis? b)What is the appropriate alternative hypothesis? c)In your own words, distinguish between a Type I and a Type II error in this context.