Your power plant emits nitrous oxides (NOx) into the atmosphereas a byproduct of burning coal. While your scrubbers collect muchof the pollutant before it leaves your smokestacks, they cannot getit all. You have an allowance of one hundred pounds of NOx per day.The state environmental commission shows up periodically to testwhether you are staying within your allowance. If you are notwithin your allowance, you will have to purchase more allowancefrom a plant that is not using all of theirs (a costlyproposition). You periodically test your smoke to see how thingsare going. The numbers in the table represent a test of n = 10randomly selected days over the past month.
a. Construct a 95% confidence interval for your average dailypounds of pollutants.
b. Should you be worried? Why, why not? ?
Day | Pounds |
1 | 99 |
2 | 85 |
3 | 82 |
4 | 102 |
5 | 90 |
6 | 110 |
7 | 108 |
8 | 91 |
9 | 93 |
10 | 106 |
