Questions on the statistical functions of Mathematica.

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1answer
62 views

Estimating Parameters of a Custom Distribution

The problem is I can not get estimation of parameters of any custom probability distribution (distributions are not built in Mathematica), here is an example: First: I entered random numbers of ...
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1answer
107 views

Generating a list of standard normal random variables

Im trying to generate a list of random (standard) independent normal variables. For this, I first generate a random list of, say, 100 real numbers in the range [0, 1000], and then make them standard ...
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1answer
71 views

What is the meaning of Automatic in goodness of fit test?

I can't find what is the distribution corresponding to the default option in: DistributionFitTest[data, Automatic, "HypothesisTestData"]; Is it N(0,1), uniform?
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1answer
201 views

How do I select a random sample without replacement? [closed]

What is the module that selects a random sample of size k (without replacement) from a given population of size n, involving the command Subsets.
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1answer
544 views

PDF of binomial distribution and mixed binomial distribution

I want to plot the PDF of binomial distributed function and a mixed binomial distributed function, therefore I entered for the binomial distribution function the following: ...
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1answer
147 views

plot probability

Hi I just want to flatten a function, I tied it with Joined->True, but it did not work, hope somebody of you can help me. This is my code: ...
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1answer
155 views

Discrete 3D plots of median ratios of two 2D matrices of lists of values

Lets say I have 2 2D arrays where each cell contains a list of values: Example: ...
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1answer
350 views

How to create function that classifies sample data

I want to create expression, that classifies samples ( 4 weather features -> decision). Example training data: For the values that i have data for, I can use rules: ...
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1answer
55 views

Solving minimum length confidence interval problem

I'm trying to find the minimum length of a confidence interval for the variance from a sample iid with normal distribution. I tried ...
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1answer
55 views

Can I use boolean parameters in LogitModelFit?

For example, to use 1 as True and 0 as False: ...
0
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1answer
136 views

Fitting data to a Poisson distribution

I'm trying to fit a Poisson Distribution to data produced in a lab. I've successfully made a Histogram of the data, which looks like: However, when I try to fit the Poisson Distribution using: ...
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1answer
69 views

Variance/Standard Deviation with a Constant Vaule

When applying variance (Variance[10]) or standard deviation (StandardDeviation[10]) to a constant value in Mathematica, Should ...
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1answer
126 views

Custom BoxWhisker Plot

I’d like to figure out how I can show my entire dataset overlaid on a box whisker plot. ...
0
votes
3answers
353 views

Plotting confidence intervals

The documentation for PDF has an example for plotting a confidence interval of a standard normal distribution: ...
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1answer
112 views

Distance to a MultivariateStatistics median

I have a population of objects (each of which is described by a list of about a half-dozen real numbers), and I'd like to find some reasonable kind of distance between each of several different test ...
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1answer
135 views

No Tukey Test on ANOVA package

I'm trying to use the ANOVA package and have mathematica display the Tukey PostTest, but all I get is this: ...
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0answers
25 views

Standard error of slope estimator [migrated]

Can someone please help explain this. I know the answer is a). Or provide a link with more information. The slope estimator, β1, has a smaller standard error, other things equal, if a) there is ...
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0answers
36 views

Chi square: compare two different distribution

I try to compare two file with two different distribution of numbers. So i have random1.dat and random2.dat each one are vectors of more then 1000 rows. I saw from this question Doing a chi-square ...
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0answers
68 views

Undo differences in a time series

I have estimated and ARMA process in Mathematica using data which I have had to take the 2nd difference of to remove the trend. I have managed to fit a model to the detrended data but cannot work out ...
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0answers
250 views

histogram fit for probability density

I am trying to fit the (probability density) histogram of some data with the exponential function, but I am having difficulties. My raw data are in file called ...
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0answers
189 views

Non linear model fit mathematica

I want to fit experimental data (temp,alpha) to the following equation for calculating k and Ea -Log[alpha]^n = function(k,Ea,temp) However i do not know ...
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0answers
132 views

Discrete distribution binomial set up

I hope one of you guys can help me out. I am trying to visualize a discrete distribution based on a binomial distribution and a mixed binomial distribution. In the first step I started to determine ...
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0answers
103 views

Binomial Distribution (binomial model inspired by Merton)

Binomial Distribution (binomial model inspired by Merton) Hi I want to do the following and I hope that anyone of you can help me out. In short, I have a portfolio consisting of 10 companies, ...
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0answers
377 views

Coefficient of determination (R squared) of EstimatedDistribution

I have estimated the distribution for a set of data as LogisticDistribution[3.5, 1.037]. How can I calculate and plot the coefficient of determination (R squared) ...
-1
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2answers
207 views

Fitting a beta distribution to a probability density curve

If I have a spectral data set showing measured energy on the y-axis and frequency on the x-axis, how would I go about fitting this to a beta distribution? For example, lets say I had the data for the ...
-3
votes
3answers
184 views

Statistical analysis of a data file and its Plot [closed]

As the title says, I have an external data file which contains thousands lines of data. The data file contains eight columns and here is what I would like to plot: Let's assume that the length of the ...