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# Questions tagged [isotonic]

isotonic means monotone, either increasing or decreasing. Use this tag for isotonic regression (monotone regression) and other forms of order-restricted inference, like hypothesis testing with ordered alternatives.

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52 views

### How to aggregate calibration curves which were created in cross validation?

When looking into Scikit's CalibratedClassifierCV I noticed that the object needs to keep multiple calibrated classifiers in memory to average the results in real time. I understand that these ...
164 views

### How to test whether $\mu_1 < \mu_2 <\mu_3$?

Suppose I have three independent groups, with mean $\mu_1,~ \mu_2,~\mu_3$ respectively. How can I test whether $\mu_1 < \mu_2 <\mu_3$ or not using $n_1,~n_2,~n_3$ samples from each group? I ...
48 views

### Hypothesis test testing for monotonic group mean change

I wonder if there is a statistical hypothesis test testing whether group average monotonically increases across groups? For example, I have four treatment groups, A, B, C and D. I would like to test ...
837 views

### What are drawbacks of isotonic regression?

I have been reading about isotonic regression and it seems like a great method that will give one a monotone regression function estimator and, moreover, is free of any tuning parameters. Why are ...
31 views

### Seeking method for isotonic regression with bound constraints

I would like to fit an isotonic regression (with respect to "ordinary" linear ordering) to observations y_1, ..., y_n subject to the additional constraints that a <= y_1^* and y_10^* <= b where ...
39 views

871 views

### Fitting constrained hierarchical models in JAGS

I have been doing some research on constrained models and have recently read the paper: Gunn and Dunson (2005) "A Transformation Approach for Incorporating Monotone or Unimodel Constraints", ...
745 views

### Binomial data analysis with all 0 responses for some treatment groups

We have a series of experiments where we measure virus transmission to plants when exposed to virus-infected insects for different time periods, so all of the experiments have similar types of ...
457 views

### Any good reference books/material to help me build a txn level fraud detection model?

I am looking for a book/case study etc on how to build a fraud detection model at the transaction level. Something applied rather than theoretical would be really helpful.