According to Statistics Canada, the average Canadian generates 2 kg of solid waste per day. Suppose we believe that, because of recycling and a greater emphasis on the environment, the figure is now lower. To test this notion, we take a random sample of Canadians and have them keep a log of their garbage for a day. We record and analyze the results by using a statistical computer package. The output follows. (Assume that the sample standard deviation, 0.39281, is close to the population standard deviation.) Describe the sample. What statistical decisions can be made on the basis of this analysis? Let α be 0.05. Assume that the masses of solid waste per day are normally distributed in the population. Discuss any substantive results.

Transcribed Image Text:

One-Sample z Test of μ = 2.0 vs. < 2.0 n Mean 22 1.80031 StDev SE Mean 0.39281 0.08375 95% Upper Bound 1.94441 Z₂ -2.38 Р 0.0087