# Questions tagged [discrete-data]

Refers to data generated from a distribution that has a countable sample space. The discrete data tag may encompass categorical data, whether nominal (e.g. the distribution of race in a sample of individuals) or ordinal (e.g. socio-economic status), or an actual discrete random variate, such as a set of event counts (e.g. the number of errors on a page of text). Discrete data need not necessarily be integer, however.

495 questions
Filter by
Sorted by
Tagged with
14 views

### How to Choose Poisson Time Interval

A Poisson process is one where mean = var = λ. How do you decide what time interval fulfills these criteria when fitting the Poisson distribution to a process? Can all processes be modeled as Poisson ...
28 views

### Example of “alternating” mass function for discrete distribution

My question is related to this question on Math.SE where it was shown that there exist discrete distributions with probability mass functions that "oscillate" in a non-monotonic way over an ...
9 views

### What is the effect of number of points on calculation of mutual information between two variables?

I was trying to calculate mutual information between two variables as follows: mutual_info_score(x,y) This essentially creates a 2d histogram and evaluates the ...
68 views

### Hypothesis test for discrete random vector with few samples

Consider a random vector $X \in \mathbb{R}^{d}$ with support $\text{supp}(X) = \{1,2,3,4\}^d$, and let $P_X$ denote its known probability mass function. Note that $\lvert \text{supp}(X) \rvert = 4^d$. ...
58 views

### Can we compare the difference of two specific proportion in 3x3 contingency table?

I have a 3x3 contingency table and would like to compare the the specific proportion's relationship. For example,, can we test if the proportion of people give response 1 in age group 1 is higher than ...
13 views

### Does it make sense to impose a density curve over the bar plot and analyze the mode?

Suppose that my X variable for my probability bar plot is discrete (i.e. not continuous) and ordinal. If this is the case, does it make sense to impose a density curve (apparently this is possible by ...
22 views

### Discrete data: Graphs and skewness

I am studying an introductory course in statistic " Essentials of Statistics". The author mentioned that Histograms are used to represent the frequency distribution of a contiuous data. Then ...
14 views

### Showing that a discrete random variable has the same moments as a Normal Distribution

Suppose I define $X$ to be normally distributed with $\mu = 0, \sigma^2 = 1$, so that $X$ has the pdf $f_{X}(x) = \frac{1}{\sqrt{2 \pi}} e^{-x^2 / 2}, \quad -\infty < x <\infty.$ Let discrete ...
24 views

### Can we normalize both continuous and discrete numerical values

I have a sensor dataset with 16 features as numerical values (12 are continuous and 4 are discrete). I am using LSTM model to fit the data and do some classification. As both continuous and discrete ...