# Questions tagged [exponential-distribution]

A distribution describing the time between events in a Poisson process; a continuous analogue of the geometric distribution.

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### Why the actual hazard ratio of the simulated time-to-event data is very different from the expected value?

I am trying to generate time-to-event data for two treatments, with 25 patients in each arm. I generated the survival time in the treatment arm using an exponential distribution with parameter 0.95, ...
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### Probability that one of two exponential random variables is the smaller

Let $X_1 \sim \text{exp} \left( {\lambda}_1 \right)$ & $X_2 \sim \text{exp} \left( {\lambda}_2 \right)$, and they are independent. Now consider the random variable $Y = \min \left[X_1, X_2 \right]$...
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### Exponential, Poisson or neither?

I have two variables in a marketing context: Advertiser spend per hour and conversions per hour. kernel density approximations of the underlying distributions look like below. Both distributions have ...
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### Interpretation of drm parameter estimates and p-values for EXD.3 function in 'drc' package in R

I was wondering if someone could help me understand what the parameter estimates and p-values are saying in a three-parameter exponential decay function using the drm function in the 'drc' package in ...
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### Goodness of fit for exponential distribution and large sample

I'm new to statistics and statistics are not my area of research so maybe my question is simple and answer is on the surface. In my research the empirical CDF for the data looks like exponential ...
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