# Questions tagged [probability]

Consider if your question would be better at stats.stackexchange.com. Probability touches upon uncertainty, random phenomena, random numbers, random variables, probability distributions, sampling, combinatorics.

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### Calibrating probabilities of neural network

I would like to calibrate the probabilites of my CNN classification model. I have a custom cross-validation and in each cross-validation run I'm dowing the following:
from sklearn.calibration import ...

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### R: How would I repeatedly simulate how many attempts before a success on a 1/10 chance? (and record how many attempts it took?)

R and probability noob here. I'm looking to create a histogram that shows the distribution of how many attempts it took to return a heads, repeated over 1000+ simulated runs on the equivalent of an ...

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### Transition probability matrix of a Markov chain with 2D state variables in python

I'm working on a time-series problem and I want to estimate the transition probability matrix of a 2D time-series data (n_samples=997, state height= 5, state width= 3) and there are only 5 possible ...

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### Probibility of sum of two random variables [closed]

If X and Y are two uniformly distributed random
variables in (0, 10) and (0, 20) respectively, then
P(X + Y > 20) is

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### How do I use probability as a factor of selecting an item from a list using choice()? [duplicate]

I want to select an item from the list using their probability as a determining factor. Below is as far as I have gotten.
import random
Nothing = {'Chance': 0.5}
Valuable = {'Chance': 0.1}
Junk = {'...

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### Probability of a point taken from a certain normal distribution will be less than or equal to than a point taken from another?

Suppose we have two independent normal distributions
How do I calculate the probability of a certain point taken from distribution X1 being less than or equal to a certain point taken from ...

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### Multiple ngrams in transition matrix, probability not adding to 1

I'm trying to find a way to make a transition matrix using unigrams, bigrams, and trigrams for a given text using python and numpy. Each row's probabilities should equal to one. I did this first with ...

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### continues density plot seaborn with lower limit

I have been using this code for my continues parameters to plot the probability distributions. However, my parameter now is price that cant be below zero, I have been reading to see if I can customize ...

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### How to solve an R problem with both exponential and poisson distribution?

I have come across questions in R which deal with exponential and poisson distributions separately, but I am unsure about how to go about it when you need to use both in the same question
The number ...

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### Can I calculate absolute probabilities from probability ratio output?

I'm using the MIAmaxent package to run a maxent analysis for a species distribution model. I have presence-only data for one species, with three habitat variables (raster format). I can provide sample ...

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### What's the probability of drawing four different suits when picking five cards?

Considering an infinite and perfectly random deck of cards (or just repositioning the cards and shuffling a normal deck after every drawn card), how do I calculate the probability that exactly x suits ...

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### Predict the total goasl of a football game after half time

I am doing a sports analytics project, and I want to predict the total goal of a football game after a given time (e.g. half time).
I was thinking about collecting data with the same half-time results,...

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### I am trying to solve this question, maybe someone help me find the solution for B and C? [closed]

enter image description here
statistics and probability question I need the solution for the B and C!

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### standard deviation in openoffice / libreoffice, but with probabilities associated

I would like to calculate the standard deviation of a set of datas with probabilities associated to values. I use openoffice, but a solution in libreoffice would be OK to me too.
Exemple :
Values : 1 -...

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### How to Estimate Teta from a sample using Newton Rapson - Distribution Cauchi in R [closed]

I have a data that seen like this -
> dput(asnum)
c(7.16523478153752, 5.66659652818595, 4.47575534893755, 4.84970857977856,
15.2276296414708, -0.573093658844655, 4.97980673868322, 2.73969325233614,...