Answer Happy

In the past, the mean age of students at a summer camp was 14.3 years old. A recent sample of 18 students from the camp found === 16.8, s = 2.8. a. Build a 99% CI for the current mean age of students at the camp. Round all intermediate calculations to two decimals, then construct the CI and enter like this: (min,max). Be sure to use parentheses or you will be marked wrong. Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes.
In the past, trout in Clearwater Creek were 14.9 inches long on average. A recent sample of 34 trout from the creek found 12.6, s = 2.2. a. Build a 99% CI for the current mean length of trout in Clearwater Creek. Round all intermediate calculations to two decimals, then construct the CI and enter like this: (min,max). ( Be sure to use parentheses or you will be marked wrong. Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes.