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===Using the Mixed Weibull Distribution in Weibull++===
#REDIRECT [[The_Mixed_Weibull_Distribution]]
 
To use the mixed Weibull distribution, simply select the Mixed Weibull Distribution from the '''Distribution''' drop down list. You can choose Mixed Weibull distribution with 2, 3, or 4 subpopulations? 
 
[[Image:Mixed Weibull Distribution Dropdown.png|thumb|center|400px]]  
 
'''Viewing the Calculated Parameters'''
 
When using the Mixed Weibull option, the parameters given in the result area apply to different subpopulations. To view the results for a particular subpopulation, select the subpopulation, as shown next.
 
[[Image:subpop1.png|thumb|center|400px| ]]
 
[[Image:subpop2.png|thumb|center|400px| ]]
 
 
 
'''About the Calculated Parameters'''
 
Weibull++ uses the numbers 1, 2, 3 and 4 (or first, second, third and fourth subpopulation) to identify each subpopulation. These are just designations for each subpopulation, and they are ordered based on the value of the scale parameter,  <math>\eta </math> . Since the equation used is additive or:
 
::<math>{{R}_{1,..,S}}(T)=\underset{i=1}{\overset{S}{\mathop \sum }}\,\frac{{{N}_{i}}}{N}{{e}^{-{{\left( \tfrac{t}{{{\eta }_{i}}} \right)}^{{{\beta }_{i}}}}}}</math>
 
the order of the subpopulations which are given the designation 1, 2, 3, or 4 is of no consequence. For consistency, the application will always return the order of the results based on the magnitude of the scale parameter.
 
 
'''Example 1:'''
{{Example:2Subpop Mixed Weibull}}

Latest revision as of 00:45, 15 August 2012

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