Question

16. A 95% confidence interval is created to ascertain the average weight of a stick in the container. Assume 900 sticks are randomly drawn from the container and the observed sample average is 3.9 ounces. The 95% confidence interval for the average weight of a stick is,

1. 3.9, plus or minus, .0033… oz
2. 3.9, plus or minus, 1.5 oz
3. Creating a confidence interval makes no sense because the observed sample average is 3.9 oz.
4. Creating a confidence interval makes no sense because the population average is known and equal to 4.0 oz.
5. None of the above.

Answer 1