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Results tagged with distributions
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user 149550
A distribution is a mathematical description of probabilities or frequencies.
1
vote
Accepted
How can I calculate the probability of a increasingly likely positive outcome?
You're looking to calculate expected value of a variable $X$, which we define as number of clicks until success.
$$E[X] = \sum_{i=1}^{10,000} i \cdot Pr(X = i)$$
Note that for each possible $i \in …
- 1,411
43
votes
Accepted
Why are survival times assumed to be exponentially distributed?
Exponential distributions are often used to model survival times because they are the simplest distributions that can be used to characterize survival / reliability data. … Normal distributions can be alright in some situations, though obviously negative survival times are meaningless. For this reason, lognormal distributions are often considered. …
- 1,411