# Tagged Questions

Questions on the statistical functions of Mathematica.

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### Finding skewness and kurtosis numerically in Mathematica

I have a function given by ...
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### How to make a cumulative time plot?

So I'm working with this data set where there is just one input(a date and time) per line in a .csv file. I've let Mathematica understand the input using "DateStringFormat". The time looks like ...
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### Forecasting problem with Geometric Brownian Motion in Wolfram Mathematica [closed]

I'm a full time undergraduate student from Peru, and I'm trying to use the Geometric Brownian Motion example used in the help section from Wolfram Mathematica in order to forecast future stock ...
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### FindDistributionParameters and Test Options

This is very much related to my earlier post FindDistributionParameters and Hypothesis Testing. However, I did not get a satisfactory anaswer and it keeps bugging me. I am trying to get help this time ...
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### Performance of a bootstrap - time of computation not linear with number of iterations

I'm doing a bootstrap based on this thread with the following code (file.txt here): ...
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### Contour lines over SmoothDensityHistogram

I am using SmoothDensityHistogram on a data set of the form {{x1, y1}, {x2, y2}, …, {x_n, y_n}}, and I would like to also show ...
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### Calculate the standard deviation between two sets of data points

I have two sets of data points, ...
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### Actual bins used for Pearson Chi Square Test

PearsonChiSquareTest[data, dist] computes bins for data as a step towards calculating the test statistic. For continuous ...
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### Which Goodness of Fit Test to use when [migrated]

I would like to know which goodness-of-fit test I should use and when. My choices are Anderson-Darling, Kolmogorov-Smirnov, Kuiper, Pearson $\chi^2$, and Watson $U^2$, and Cramer von Mises. My data ...
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### Some expectations of psi (digamma) function [migrated]

I want to derive an Expectation-Maximization algorithm for my model. But some expectations of psi (digamma) function is needed in the procedure. Assuming I have a Gamma distributed random Variable ...
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I have data ...
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### Manipulating the output of EllipsoidQuantile

I am trying to manipulate the output of EllipsoidQuantile to find the area in the next line. I can easily find the 95% confidence interval and this generates an ...
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### How to find max difference with the same x between two functions?

For example, I have function TF[y_] = 2 / Pi * ArcSin[y] And I have CDF: ...
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### ANOVA test on dataset

I have a dataset with 3 groups and two variables. I want to do ANOVA test on the three groups for each variable. Does anyone know how to do this? ...
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### Marginal distribution with weight

Given a multi-variate distribution $P(\mathbf{x},\mathbf{y})$, I would like to obtain the marginal distribution $$P_m(\mathbf{x})=\sum\int_{\mathbf{y}}P(\mathbf{x},\mathbf{y})W(\mathbf{y})$$ In my ...
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### How to plot frequency polygon?

I have data sample. Built and plotted histogram based on the sample. How can I plot frequency polygon now? That's example of the desired result. Here is code: ...
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### Attributes of statistics functions

Do statistics functions have some kind of attribute which ignore non-number (Indeterminate, ComplexInfinity, calculation "errors") elements of a list?
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### How to add points on the empirical distribution function on the leftside of the pieces (steps)?

Faced the problem. Here is code: ...
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### How do I create a histogram of the binomial distribution for, say, p=.5 after 10 trials?

I apologize if this is question is too simple, if so it's because I'm a beginner. Anyway, it was easy enough to create a list plot, but I couldn't find out how to create an output that displays the ...
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### BoxWhiskerChart Vertical Line

I have made a box plot to show the spread of past paper results for my A2 exams so I can easily see which subject need more work! ...
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### Derived distribution

I'm trying to solve a parametric DE in the unknown z(t,r), where the distribution of r is known, and obtain the derived ...
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### Interpreting P-Value on ParameterTable

When using LinearModelFit[] we can generate a table of parameter values and statistics for the corresponding model using the property "ParameterTable". Looking in the documentation I can't find an ...
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### How to remove outliers from data

I have a data with noise which some times includes significant outliers. The position of the outliers are random. For example: ...
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### How to draw confidence ellipse from a covariance matrix?

I am studying a two-dimensional dataset, whose mean vector and covariance matrix are the following: ...
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### How can I make an animated demonstration of the Wigner semicircle distribution?

With Mathematica 10, it's possible to draw the semicircle distribution of R. Wigner: ...