# Statistics for Environmental Engineers

Скачать в pdf «Statistics for Environmental Engineers»

Tiao, George et al., Eds. (2000). Box on Quality and Discovery with Design, Control, and Robustness, New York, John Wiley & Sons.

### Exercises

13.1 Find the Disturbance. Based on historical information, five machines vary randomly about an average level of 11.2 with a standard deviation of 1.0. The table below gives a series of operating data for each machine. Check each machine for change in average level, a “bump” of width = 3, a sinusoidal disturbance with period p = 12 and period p = 24, and a change in slope from 0 to 0.02.

Machine    Machine

 Time 1 2 3 4 5 Time 1 2 3 4 5 1 11.8 11.8 11.8 11.8 11.8 26 11.4 12.3 14.9 11.4 11.9 2 11.7 11.7 11.7 11.7 11.7 27 13.0 14.0 16.5 13.0 13.5 3 13 13 13 13.0 13.0 28 10.6 11.5 14.1 10.6 11.2 4 11.1 11.1 11.1 11.1 11.1 29 11.3 11.8 14.8 11.3 11.9 5 10.5 10.5 10.5 10.5 10.5 30 10.9 10.9 14.4 10.9 11.5 6 10.5 10.5 10.5 10.5 Скачать в pdf «Statistics for Environmental Engineers» P. M. Berthouex, L. C. BrownISBN 1-56670-592-4Метки учебные пособия