# Questions tagged [statistics]

Consider whether your question would be better at http://stats.stackexchange.com. Statistics is the mathematical study of using probability to infer characteristics of a population from a limited number of samples or observations.

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### How to make a 3D plot of a 2D vector distribuition in python

So, basically I have a list of 2D vectors in python, and I want to make a 3d visualization of the distribuition of this vector, like a surface curve, throught plotly. I'll leave a sample of the first ...
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### What kind of skewness do Excel's Skew and Skew.P functions compute?

According to the Excel documentation, Skew computes the (not specified) skewness, and Skew.P computes the population skewness. The documentation does not state, which measure is meant. Wikipedia ...
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### Finding 10th percentile for all the data cumulatively

I have a dataframe with columns: sr.no., date, company name, pe, etc. I want to find the 10th percentile for all the data below it. I have data that range from 2000 to 2020. for example, my 10th ...
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I want to make a Unity game that sends ingame stats to a website, Like how many times a player has shot, how many kills the play has. ect. my question is is this even possible using Unity? if yes ...
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### Is there any (statistics)indexs for check oftenness at Date?

I want to know how to check oftenness. The oftenness means , for example, how often do online user enter the online channel. So, I wanna get some index that some user is heavy user or not. Here is ...
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### How to find correlation between target variable and other variables?

How to find the correlation between the numerical target variable and categorical variables with a large number of unique values??
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### What statistical test could be used to detect a minimal one from a series of lists?

Assume we have four lists: l1 = [100, 123, 29, 90, 107] l2 = [13, 21, 81, 79, 40] l3 = [1, 7, 9, 0, 3] l4 = [41, 123, 371, 54, 63] At a glance, l3 has minimal numbers, since its range/average are ...
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### How to measure difference in two groups for a longitudinal test?

I have built a model that predicts which customers are likely to churn in the next quarter. To test the model I am doing a kind of longitudinal test in 3 phases. I have two groups of equal sizes: ...
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### Min, Max, Average of n distinct top/low values and plotting them with time series data on the same graph in R

I am dealing with a large time series data set (with almost 100K records) with unix timestamp. I need min, mean, max, avg_of_lowest_n, avg_of_top_n from the value column. I can get min, mean, max as ...
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### How to find the similarity in R?

I have a data set as I've shown below: It shows which book is sold by which shop. df <- tribble( ~shop, ~book_id, "A", 1, "B", 1, "C", 2, "D", ...
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### Calculating co-variance in Python without Numpy or Stats modules

I have been tasked with writing a function in python to calculate the covariance of an array, without using the numpy or statistics module. I used the below to find the variance: def daml_var(x): ...
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### R Studio gplots library 'coplot' function: “Error in : object 'y' not found”

I am trying to do the "Fixed/Random Effects Models using R" exercise found at (http://rstudio-pubs-static.s3.amazonaws.com/372492_3e05f38dd3f248e89cdedd317d603b9a.html) However, for homework I have ...
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### Wilcoxon-Mann Whitney test

If the dependent variable under question is ordinal/categorical and independent variable have 2 categorical variable can Mann-Whitney test be applied or 2 independent sample t test can be applied?