Question

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 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?

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