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大药丸子

新虫 (初入文坛)

[求助] design expert 结果处理

请问design expert 设计结果怎么分析,是否可行?

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大药丸子

新虫 (初入文坛)

引用回帖:
2楼: Originally posted by 赵统超 at 2018-11-30 20:01:17
你这么发帖谁能看懂

Use your mouse to right click on individual cells for definitions.
Response        1        温度
        ANOVA for Response Surface Linear Model
Analysis of variance table [Partial sum of squares - Type III]
        Sum of                Mean        F        p-value
Source        Squares        df        Square        Value        Prob > F
Model        149.55        2        74.78        17.22        0.0013        significant
  A-P188        98.84        1        98.84        22.77        0.0014
  B-P407        62.43        1        62.43        14.38        0.0053
Residual        34.73        8        4.34
Lack of Fit        34.61        6        5.77        92.28        0.0108        significant
Pure Error        0.13        2        0.063
Cor Total        184.28        10

The Model F-value of 17.22 implies the model is significant.  There is only
a 0.13% chance that a "Model F-Value" this large could occur due to noise.

Values of "Prob > F" less than 0.0500 indicate model terms are significant.  
In this case A, B are significant model terms.  
Values greater than 0.1000 indicate the model terms are not significant.  
If there are many insignificant model terms (not counting those required to support hierarchy),  
model reduction may improve your model.

The "Lack of Fit F-value" of 92.28 implies the Lack of Fit is significant.  There is only a
1.08% chance that a "Lack of Fit F-value" this large could occur due to noise.
Significant lack of fit is bad -- we want the model to fit.

Std. Dev.        2.08        R-Squared        0.8115
Mean        35.33        Adj R-Squared        0.7644
C.V. %        5.90        Pred R-Squared        0.6279
PRESS        68.56        Adeq Precision        10.548

The "Pred R-Squared" of 0.6279 is in reasonable agreement with the "Adj R-Squared" of 0.7644.

"Adeq Precision" measures the signal to noise ratio.  A ratio greater than 4 is desirable.  Your
ratio of 10.548 indicates an adequate signal.  This model can be used to navigate the design space.

Coefficient        Standard        95% CI        95% CI
Factor        Estimate        df        Error        Low        High        VIF
Intercept        34.89        1        0.65        33.40        36.38
A-P188        3.08        1        0.65        1.59        4.57        1.01
B-P407        -2.66        1        0.70        -4.27        -1.04        1.01



Final Equation in Terms of Coded Factors:

温度         =
+34.89
+3.08         * A
-2.66         * B

Final Equation in Terms of Actual Factors:

温度         =
+54.85949
+2.46604         * P188
-1.32795         * P407


The Diagnostics Case Statistics Report has been moved to the Diagnostics Node.
In the Diagnostics Node, Select Case Statistics from the View Menu.

Proceed to Diagnostic Plots (the next icon in progression).  Be sure to look at the:
   1) Normal probability plot of the studentized residuals to check for normality of residuals.
   2) Studentized residuals versus predicted values to check for constant error.
   3) Externally Studentized Residuals to look for outliers, i.e., influential values.
   4) Box-Cox plot for power transformations.

If all the model statistics and diagnostic plots are OK, finish up with the Model Graphs icon.
3楼2018-11-30 22:17:20
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赵统超

木虫 (正式写手)

2楼2018-11-30 20:01:17
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大药丸子

新虫 (初入文坛)

引用回帖:
2楼: Originally posted by 赵统超 at 2018-11-30 20:01:17
你这么发帖谁能看懂

这个设计的结果可行吗?谢谢啦
4楼2018-11-30 22:18:31
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赵统超

木虫 (正式写手)

回归系数有点低,拟合程度不是很好

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5楼2018-12-01 13:27:10
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