# Questions tagged [statistics]

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308 questions
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### Generating random number from a binomial distribution

In my application of Monte Carlo simulation, the crucial part is to generate a random number from a binomial distribution with parameters n = size and p = 0.5. Here is my current implementation ...
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### Welford's online variance calculation algorithm for vectors

I'm developing a face recognizing application using the face_recognition Python library. The faces are encoded as 128-dimension floating-point vectors. In addition to this, each named known person ...
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### Sample size, P-values (its relationship), and data visualization with plots. ggplot and T test

We know that P-values (within t-test context as an example..) is highly sensitive to sample size. A larger sample will yield a smaller p-value remaining everything else constant. On the other hand, ...
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### Python implementation of approximating the chance a particle is at a location after n steps in the cardinal directions

Recently, I became very interested in a probability practice problem in my textbook for my class. I decided to implement it in code and I think I got most of it implemented. Right now, I'm hoping to ...
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### A Java program which accepts grades and prints grade distribution

I'm doing the MOOC Java course, this is the problem: This is a link to the problem in detail if you'd prefer that, CTRL+F "distribution" The input of the program is a set of exam scores of a ...
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### Constructing a cumulative distribution function from a histogram

During some running process, a histogram of values shall be build up. When done, the CDF shall be derived from it and used to get the quantiles for some values. My current implementation looks as ...
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### Evaluating association strengths of items

I have a list of animals with their counts: ...
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### Simple data analysis for forecasting

This Python script extracts data from txt files containing raw numerical data, notably the increase average, the relative evolution and the standard deviation of ...
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### Incrementing time in a discrete-event simulation of a supermarket queue

A method has been written that increments time in minutes that simulates how much time it takes to process item in a supermarket queue and if there is an empty queue, skip it and loops around to find ...
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### Linear regression on points specified by the user in a GUI

Here's my take on the Linear Regression exercise from John Zelle's Python book. Open a window, let the user click on as many points as they want. Upon pressing the "Done" button the regression line ...
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### Download and analyze PDFs of Congressional records

This is built with Python 2.7.15. The goal of this script is to count the number of words spoken by each Senator on the floor of Congress between given dates. It pulls from the Congressional Record, ...
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### Counting consecutive selections of a given number when sampling integers in a range

This script counts consecutive number strikes of a number that you determine in a number-sequence that you also determine. I would be very pleased if this script can be reviewed in terms of ...
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### Application to monitor device power levels for deviations

I have a high performance, computation intensive application that runs on a Centos 7 machine with Python 2.7.5. I'll try to explain what the application does: The application runs an infinite loop, ...
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### Plots of prior and posterior distributions for a model

I have an exercise that ask to plot the prior and posterior distribution in the Poisson-Gamma model. I did it (I think it's correct) inspired in the answer of this question https://stats.stackexchange....
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### Simulating data generating process correctly

My aim is to simulate the following model by means of a Monte Carlo simulation. I wonder if my R code is correct for generating the data. Could somebody check? The model: Y = \sum_{j=1}^{100} (...
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### Generating probability table of 2-character combinations from text file in Java

I have written a probability table generator in Java to help me generate randomized girl's names for the game I am making. It reads from a text file and creates a ...
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### Calculate min, max, mean and median out of array Version 2

This question is a follow up of: Calculate min, max, mean and median out of array I took all the suggestions an reworked the code. Like the description of the excercise suggests i only use one ...
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### Calculate min, max, mean and median out of array

Another C exercise: Write a function that takes an array of 'ints' as its input and finds the smallest and largest elements. It should also compute the median and mean. Use a ...