Please answer the questions listed below based on the data at top.

Trial # of planes Estimated #of planes Difference of actual plans and estimate

1 21.0 20.0 1.0

2 17.0 17.0 0.0

3 10.0 8.0 2.0

4 16.0 12.0 4.0

5 17.0 15.0 2.0

6 9.0 8.0 1.0

7 19.0 19.0 0.0

8 12.0 10.0 2.0

9 8.0 7.0 1.0

10 20.0 20.0 0.0

11 18.0 16.0 2.0

12 14.0 12.0 2.0

13 11.0 11.0 0.0

14 9.0 7.0 2.0

15 7.0 7.0 0.0

16 14.0 15.0 -1.0

17 7.0 6.0 1.0

18 22.0 20.0 2.0

19 12.0 13.0 -1.0

20 18.0 17.0 1.0

Standard deviation of estimate for difference scores:

(The difference between your answer and the correct value must be less than 0.01.)

Standard error:

(The difference between your answer and the correct value must be less than 0.01.)

Degrees of freedom:

(Your answer must exactly equal the correct value.)

t critical value for a 95% confidence interval:

(The difference between your answer and the correct value must be less than 0.01.

Lower limit of the 95% confidence interval:

(The difference between your answer and the correct value must be less than 0.01.)

Upper limit of the 95% confidence interval:

(The difference between your answer and the correct value must be less than 0.01.