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530 votes

23 answers

286k views

Why square the difference instead of taking the absolute value in standard deviation?

c4il

5,545

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188 votes

9 answers

717k views

How to summarize data by group in R? [closed]

r data-transformation

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4,101

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92 votes

10 answers

386k views

Is there a minimum sample size required for the t-test to be valid?

t-test sample-size assumptions statistical-power

Czarina Francoise

921

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77 votes

10 answers

11k views

What are the major philosophical, methodological, and terminological differences between econometrics and other statistical fields?

econometrics terminology philosophical

Ari B. Friedman

3,441

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73 votes

10 answers

1.1m views

What is the difference between discrete data and continuous data?

continuous-data discrete-data

Albort

881

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71 votes

7 answers

91k views

What is a "saturated" model?

modeling regression

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7,593

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65 votes

14 answers

11k views

What is the most surprising characterization of the Gaussian (normal) distribution?

probability normal-distribution mathematical-statistics characteristic-function

robin girard

6,345

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3 answers

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Statistics and causal inference?

causality

Shane

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52 votes

4 answers

98k views

What is difference-in-differences?

regression econometrics difference-in-difference

Graham Cookson

7,593

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47 votes

5 answers

103k views

What references should be cited to support using 30 as a large enough sample size?

references sample-size normality-assumption central-limit-theorem rule-of-thumb

Lan

1,261

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47 votes

2 answers

4k views

How well can multiple regression really "control for" covariates?

multiple-regression ancova observational-study

half-pass

3,501

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45 votes

8 answers

196k views

What is the reason why we use natural logarithm (ln) rather than log to base 10 in specifying function in econometrics?

econometrics

ritho

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44 votes

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Is machine learning less useful for understanding causality, thus less interesting for social science?

machine-learning econometrics

d_a_c321

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43 votes

1 answer

25k views

Proof that the coefficients in an OLS model follow a t-distribution with (n-k) degrees of freedom

regression linear-model least-squares t-distribution

Garrett

611

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41 votes

6 answers

27k views

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time-series hypothesis-testing autocorrelation

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57k

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41 votes

4 answers

15k views

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regression econometrics instrumental-variables

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40 votes

4 answers

5k views

Justification of one-tailed hypothesis testing

hypothesis-testing

Yang

3,071

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39 votes

3 answers

27k views

Why is RSS distributed chi square times n-p?

regression distributions least-squares

Tal Galili

20.3k

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39 votes

5 answers

11k views

The meaning of "positive dependency" as a condition to use the usual method for FDR control

multiple-comparisons non-independent false-discovery-rate

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15.3k

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38 votes

4 answers

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Functions of Independent Random Variables

probability self-study random-variable independence

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18.7k

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33 votes

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12k views

Is the sum of two white noise processes necessarily a white noise?

time-series econometrics white-noise

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431

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28 votes

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How to handle ordinal categorical variable as independent variable

regression logistic ordinal-data predictor

rahmat

281

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27 votes

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regression modeling econometrics panel-data difference-in-difference

Tom

385

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26 votes

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11k views

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regression hypothesis-testing least-squares f-distribution f-statistic

user1627466

363

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25 votes

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Representing interaction effects in directed acyclic graphs

interaction causality dag

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hypothesis-testing

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25 votes

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nonlinear-regression fixed-effects-model bias

emeryville

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24 votes

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A proof for the stationarity of an AR(2)

self-study stationarity arma

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21 votes

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The proof of equivalent formulas of ridge regression

lasso regularization ridge-regression lagrange-multipliers

jeza

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Why square the difference instead of taking the absolute value in standard deviation?

How to summarize data by group in R? [closed]

Is there a minimum sample size required for the t-test to be valid?

What are the major philosophical, methodological, and terminological differences between econometrics and other statistical fields?

What is the difference between discrete data and continuous data?

What is a "saturated" model?

What is the most surprising characterization of the Gaussian (normal) distribution?

Statistics and causal inference?

What is difference-in-differences?

What references should be cited to support using 30 as a large enough sample size?

How well can multiple regression really "control for" covariates?

What is the reason why we use natural logarithm (ln) rather than log to base 10 in specifying function in econometrics?

Is machine learning less useful for understanding causality, thus less interesting for social science?

Proof that the coefficients in an OLS model follow a t-distribution with (n-k) degrees of freedom

Testing for autocorrelation: Ljung-Box versus Breusch-Godfrey

What is an instrumental variable?

Justification of one-tailed hypothesis testing

Why is RSS distributed chi square times n-p?

The meaning of "positive dependency" as a condition to use the usual method for FDR control

Functions of Independent Random Variables

Is the sum of two white noise processes necessarily a white noise?

How to handle ordinal categorical variable as independent variable

Specifying a difference in differences model with multiple time periods

Proof that F-statistic follows F-distribution

Representing interaction effects in directed acyclic graphs

Why is the null hypothesis always a point value rather than a range in hypothesis testing?

Incidental parameter problem

A proof for the stationarity of an AR(2)

The proof of equivalent formulas of ridge regression

Whats the relationship between $R^2$ and F-Test?