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# Questions tagged [logistic-distribution]

A distribution which CDF is the logistic function.

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26 views

### How to specify a risk model?

I'm reading this article. The authors indicated that for a random sample of 12 characteristics and 3600 patients affected in two arms (control and treatment arm), they fitted a risk model consisting ...
46 views

### Can logistic regression output a non linear curve?

I have a doubt regarding logistic regression.I know that it separates the data into 2 parts.Is it possible that it leads to a curve as shown in the example of underfitting and overfitting What i know ...
24 views

### Parametric shared frailty models with individual monotone yet population non-monotone hazard

I'm fitting parametric survival models with/without shared frailty on individuals. The hazard in my data is very low at first, then increases and finally decreases again, sort of a bell shaped curve. ...
104 views

### What is the probability distribution used in logistic regression called?

In logistic regression, we set the probability of predicting a target $y$ given a data $x$ as, $\Pr(Y = 1|X;w) = \dfrac{\exp(w^TX)}{(1+\exp(w^TX))}$ What is exactly this probability distribution (or ...
25 views

### Independent variables should have exponential distribution in logistic regression

As per my understanding of logistic regression, a log of odds of the desired value of “y” should be in linear relation with the log (x). Does that mean that independent variables should have ...
19 views

### Location and scale estimation for log-logistic in scipy

I have to estimate the location and scale parameters for a log-logistic or fisk distribution using scipy. The shape parameter is already defined and I would like to estimate loc and scale parameter ...
29 views

### “Hazard function” for logistic PDF

Question: Does hazard function $h(x, \mu, \sigma)=\frac{f(x, \mu, \sigma)}{1-F(x, \mu, \sigma)}$ of logistic PDF $f(x,\mu, \sigma)$ make sense? The problem is that logistic PDF is defined for ...
48 views

30k views

### Logistic Regression - Error Term and its Distribution

On whether an error term exists in logistic regression (and its assumed distribution), I have read in various places that: no error term exists the error term has a binomial distribution (in ...
213 views

### How to compute for Bivariate Logistic Distribution

This is the logistic distribution of single random variable (taken from Wikipedia). $x$ = random variable $\mu$ = mean of all random variables $s$ = variance. Now, I want to do a Bivariate logistic ...
2k views

### Multivariate logistic distribution

The normal distribution can be generalized into the multivariate normal distribution. Can the logistic distribution also be generalized into a similar multivariate distribution? Is there a ...