# Questions tagged [univariate]

Pertaining to a single variable. Univariate statistics deal with only one variable - e.g. the mean, standard deviation, range etc. Univariate distributions involve only one variable e.g. the univariate normal, uniform etc. distributions.

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### Univariate after stepwise regression?

My aim is to understand and describe the effect that independent variables (ordered and unordered factors and continuous) have on a continuous dependent variable. First, I thought about using a ...
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### Joint density and univariate time series models

Is the picture below an example of univariate time series model since I am observing the same random variable just at different time points? Can joint density be used to explain univariate time series ...
1 vote
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### Under what conditions does univariate variable prescreening fail? (random forest modeling)

Univariate statistical methods are often used to prescreen variables for possible inclusion in a model. For example, running random forests (RF) with only a single predictor at a time to prescreen ...
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### Survival analysis - univariable and multivariable regression [duplicate]

I am running an analysis of various factors that determine whether an individual is likely to have an event. My outcome is binary (0 vs 1), and my explicative variables can be both quantitative or ...
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1 vote
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### What methods to do for analysis

So i am designing a study where there are 2 groups of students. One group which is part of Y number of departments have not received trainingA. The other group of students which are part of X number ...
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### how to quantify the strength of trend in univariate time series data?

I have data that looks something like this: ...
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### How to handle missing data in the univariate analysis

Can someone please advise me on how to handle missing data in the univariate analysis (e.g. t-test, chi-squared test)? Given that the multiple imputation techniques (MICE package) are for multivariate ...
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### How does aggregation across time bring about feedback?

On page 11 Pankratz says: "Sometimes there is sound theoretical reasoning in favor of a one-way relationship from the inputs to the output (no feedback). But even then it is important to have a ...
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### How to accommodate for covid-19 shocks in SARIMA when forecasting economic variables?

I am trying to forecast an economic variable using 1.Univariate Model 2.Multivariate Models Due to covid-19, there is a huge drop in the considered variable and it impacts the accuracy. However the ...
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### Regression not significant on univariate but significant when adding controls

I have a data on job type (i.e. dummy variable 1 if bad job and 0 if good job) and amount of debt individuals hold before finding a job. I ran a regression of job type on debt level, and I did not get ...
183 views

### Can a (possibly infinite) mixture of Gaussians be Gaussian?

Suppose we define a (possibly infinite) mixture of zero-mean Gaussians: $$p(x) = \int_{\mathbb{R}^+} N(x; 0, \sigma^2)\ \pi(\sigma)\,\text d\sigma,$$ where $\pi$ defines the mixture components. ...
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### How to establish a standardized score for non-normal/long-tail distribution

Apologies if this is an elementary question. My rusty high school understanding of statistics has left me a bit lost to the following problem. Essentially, I have several long-tail distributions of ...
1 vote
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### Is this an example of a univariate analysis?

Nonstatistician needs help with terms. Is the following an example of a univariate analysis?: Chances of getting a job at Microsoft with respect to demographic variables such as age, gender, race, etc....
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### Rolling vs Recursive vs Fixed Window Regression

What precisely are the differences between rolling, recursive and fixed window regression? As far as I understand, recursive: we train on a period $y(0)$ to $y(n)$ then predict $\hat{y}(n+1)$. Then ...
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### How different will that be between the R-squared of linear regression y~x and square of cor(x,y)

Generally, both of them can represent the linear relationship between x and y scale to [0,1]. Are they 99% very similar?
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1 vote