In: Statistics and Probability
1 | 19.7 |
1 | 14.7 |
1 | 19.5 |
1 | 18 |
1 | 15.3 |
1 | 13 |
1 | 18.1 |
1 | 22.6 |
1 | 17.2 |
1 | 22 |
2 | 11.8 |
2 | 11.5 |
2 | 13.8 |
2 | 4 |
2 | 12.1 |
2 | 13.4 |
2 | 16.6 |
3 | 15.3 |
3 | 17.2 |
3 | 22.4 |
3 | 21.2 |
3 | 22.1 |
3 | 22.7 |
3 | 24.5 |
3 | 19.5 |
3 | 21.5 |
4 | 14.7 |
4 | 14 |
4 | 13.7 |
4 | 14.6 |
4 | 14.4 |
4 | 17.2 |
4 | 17.2 |
4 | 17.4 |
4 | 14.6 |
1) What was the margin of error for the confidence interval for gasoline mileage of make 2?
2) What was the lower 95% confidence limit for make 2 mileage?
3) What was the upper 95% confidence limit for make 2 mileage?
4) What is the value of the t test statistic for testing the hypothesis that makes 2 and 3 do not differ in mileage?