1-1 Statistics in Engineering
Figure 1-3 Dot diagram of pull-off force for two wall thicknesses. 1-1 Statistics in Engineering
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Mas 291 - 2021, ch04.v1a
- Điều hướng trang này:
- Three basic methods for collecting data
- A retrospective
- An observational
| Figure 1-3 Dot diagram of pull-off force for two wall thicknesses.
1-1 Statistics in Engineering Engineering Example
X = μ + ε where μ is a constant and ε a random disturbance. 1-1 Statistics in Engineering 1-1 Statistics in Engineering Three basic methods for collecting data:Three basic methods for collecting data:
1-2 Collecting Engineering Data A retrospective study using historical data
would use either all or a sample of the historical process data archived over some period of time.1-2 Collecting Engineering Data An observational study: the engineer observes the process or population, disturbing it
1-2 Collecting Engineering Data A designed experiment: the engineer makes deliberate in the controlable variables of the system, observes the resulting system output data
1-2 Collecting Engineering Data 1-2.5 Observing Processes Over Time Figure 1-9 A time series plot of concentration provides more information than a dot diagram. Whenever data are collected over time it is important to plot the data over time. Phenomena that might affect the system or process often become more visible in a time-oriented plot and the concept of stability can be better judged. tải về 1.12 Mb. Chia sẻ với bạn bè của bạn:
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