2.35.

2. 10.25
3. 10.15

2.36.

2.37.

1. 314.3.
2. 51.6.

2.38. 25

2.39. 68

2.40.

1. . No, the true value is not in the interval.

2.41.

1. . Yes, the true value is in the interval.

2.42.

1. . Yes, the true value is in the interval.

2.43.

3.13.

3.14. 0.579. No, the coin is almost certainly not fair.

3.15.

3.16. 1068

3.17. 3382

3.18. . The theoretical value is approximately 0.637, which is not in the confidence interval.

4.15.

1. The two methods are equivalent.
2. The bivariate normal model works better.

4.16.

3. Perhaps not.
4. Yes

4.17. A 90% confidence lower bound for the difference in IQ is 2.675. There may be a vary small increase.

4.18.

3. Yes

4.19.

3. Perhaps not.

5.2.

5.4.