1. Horng-Chyi HorngStatistics II_Five43 Inference on the Variances of Two Normal Population &5-5 (&9-5)

2. Horng-Chyi HorngStatistics II_Five44

3. Horng-Chyi HorngStatistics II_Five45

4. Horng-Chyi HorngStatistics II_Five46 The Test Procedure

5. Horng-Chyi HorngStatistics II_Five47

6. Horng-Chyi HorngStatistics II_Five48

7. Horng-Chyi HorngStatistics II_Five49

8. Horng-Chyi HorngStatistics II_Five50 Confidence Interval on the Ratio of Two Variances

9. Horng-Chyi HorngStatistics II_Five51

10. Horng-Chyi HorngStatistics II_Five52 n Two independent random samples of size n 1 and n 2 are taken from two populations, and let X 1 and X 2 represent the number of observations that belong to the class of interest in samples 1 and 2, respectively. n For large samples, the estimation of the population proportions have approximate normal distributions. Inference on Two Population Proportions (I) &5-6 (&9-6)

11. Horng-Chyi HorngStatistics II_Five53 Inference on Two Population Proportions (II) n Therefore, is approximately standard normalization. n If H 0 : p 1 = p 2 is true, that is, p 1 = p 2 = p, then

12. Horng-Chyi HorngStatistics II_Five54 Inference on Two Population Proportions (III)

13. Horng-Chyi HorngStatistics II_Five55

14. Horng-Chyi HorngStatistics II_Five56

15. Horng-Chyi HorngStatistics II_Five57 Confidence Interval for p 1 – p 2

16. Horng-Chyi HorngStatistics II_Five58

17. Horng-Chyi HorngStatistics II_Five59

18. Horng-Chyi HorngStatistics II_Five60