# Questions tagged [hypothesis-testing]

Hypothesis testing assesses whether data are inconsistent with a given hypothesis rather than being an effect of random fluctuations.

6,152 questions
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### Construct probability that measurement belongs to one of two sets

We are dealing with a measurement apparatus that is cursed by noise and are trying to find out if a measurement was noise or an actual measurement. Assume we have a beam of light incident on an ...
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### Moving from conversion rates to sales volume in A/B tests

there is a short introduction to AB Tests in this question or here at 20bits. We are currently testing different versions of landing pages and are using the conversion rate (e.g. 4% vs. 5%) to track ...
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### How to estimate a critical value of Spearman's correlation for n=100?

I have searched a lot, and I can only find tables that show critical values up to n=30. Can someone provide, or point me to, a simple method of estimating this value for different $\alpha$?
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### Two sample t-test for data (maybe time series) with autocorrelation?

I am new to statistics, so pardon any mistakes in my question. I have two time series $X_i$ and $Y_i$. Assuming that they're stationary AR(1) processes with possibly different means, how do I test ...
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### Which non-parametric test can I use to identify significant interactions of independent variables?

I have an experiment producing results (dependent variables) that don't pass tests of normality, thus I am testing hypotheses using non-parametric tests. My DVs are continuous, while my factors (...
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### Is there any difference between the terms “paired t-test” and “pairwise t-test”?

What is paired t-test, and under which circumstances should I use paired t-test? Is there any difference between paired t-test and pairwise t-test?
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### Appropriate test to compare online voting data

The data I want to analyze consist of set of votes similar to the voting system here on stackexchange. Votes are binary, i.e, items can receive up- or down-votes. The data have been gathered in an A/B ...
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### Difference between two slopes

I have a dataset with yearly levels of corruption in a number of countries, as well as whether they changed their government that year. ...
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### Nonparametric sign test for correlated variables

I have a question regarding the sign test when the individual measurements may be correlated. Let me start off with some background. Suppose we have 4 Organisms (a,b,c,d),and we make measurements in ...
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### Effect size of McNemar's Test

I'm using McNemar's test. Basically this question is about best practices when reporting results using McNemar's test. I want to report the effect size. What is a sensible effect size for McNemar's ...
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### Resampling, binomial, z- and t-test: help with real data

I am trying to understand how I can use resampling techniques to compliment my pre-planned analyses. This is not homework. I have a 5 sided die. 30 subjects call a number (1-5) and then roll the die. ...