Hypothesis testing

9.2 Identifying the Hypotheses: Exercises 1. An environmental group collects a liter of water from each of 45 ran- dom locations along a stream and measures the amount of dissolved oxygen in each specimen. The observed mean is 4.62 milligrams (mg). The group wants to show that the stream has a mean oxygen content of less than 5 mg per liter [2, 14.17] (a) What does the population mean M represent? (b) What is the value of the claimed constant Mo? (c) Using Formula 88 notation, what is the alternative hypothesis H.? (d) Is H. right-tailed, left-tailed, or two-tailed