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Latest Discussions

• Question about R2 for weighted linear regression in JMP

  I used JMP to conduct a weighted linear regression analysis. However, RSquare value of the regression output by JMP (around 0.76) doesn't match my own calculation using the general formula of R2 = 1 - SS_residual/SS_total (around 0.78). The regression parameters output by JMP match my own calculation, so I suppose the regression was conducted correctly. I was wondering if R2 output by JMP is incor...

  hongyu1

  Discussions |

  Aug 11, 2024 1:49 AM

  800 views | 1 replies

• Optimising Concentration of Two Factors

  Hi all,I am trying to develop a screening platform to find the best mixture of two factors. I have chemical A and B and want to run experiments with a variety of concentrations of just A, just B, and then a variety of experiments with A and B mixed together in different ratios. I have previously only performed two-factor DoE and am confused about where to start with this experiment. I initially th...

  miggledee

  Discussions |

  Aug 11, 2024 1:41 AM

  620 views | 3 replies

• Does the partition platform require equal variance?

  I have highly right skewed data (see distribution Leaks/mi Yr attached), only about 400 leaks on ~4,000,000 segments of pipe. I use the partition platform to identify factors for our model with differences in leak rates. But my data indicates unequal variance (attached RefService2023wLeaks - FitY by X, fails 4 of 5 variance tests). Does the partition platform require equal variance? By the Central...

  billboard

  Discussions |

  Aug 11, 2024 1:33 AM

  908 views | 2 replies

• Manually amending a DoE experiment suggested by JMP

  If for whatever reason, it is not possible to run a particular run, but a related one is possible, can the DoE design be manually amended? For example, if experiment ++-++ is suggested but is not possible and ++--+ is (and the latter does not appear elsewhere in the original design) can the user manually make the substitution, whilst bearing in mind that this change will likely alter the significa...

  kjwx109prime

  Discussions |

  Aug 11, 2024 1:04 AM

  788 views | 4 replies

• Control chart: Xbar and S chart with large subgroup size unable to extract or calculate limits

  I am working on building Xbar and S chart to monitor a process where we observe the data (Y) every 1 minute across multiple runs. I wanted a chart where I have the control limits be the average of each time point across runs, which I believe the Xbar and S chart is doing. However, the actual LCL and UCL limits are not showing up, and I don't know how to extract them from the plot (see example char...

  Abby_Collins14

  Discussions |

  Aug 10, 2024 8:54 AM

  900 views | 4 replies