Linked Questions
83 questions linked to/from How to choose between t-test or non-parametric test e.g. Wilcoxon in small samples
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Hypothesis testing for mean difference of 2 samples
For example,
\begin{array} {|r|r|}\hline & \text{Sample}\enspace X & \text{Sample}\enspace Y \\ \hline mean & 14 & 20 \\ \hline median & 5 & 5 \\ \hline \end{array}
How ...
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We should verify first if the variances are equal with F-test before verify if the means are equal with t-test? [duplicate]
We have two samples with different sizes: 42 and 47 and we have to verify if the means of the two samples are equals.
For verify this with t-test, we should verify first if the variances are ...
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Other statistical tests for paired data
Are there other statistical tests available to compare paired sets of data e.g. {1, 2, 2, 3, 4} v's {3, 3, 3, 2, 5} for similarity, aside from the paired Wilcoxon and paired Student t-test?
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probability of data ratio increasing
I have a data set of control and paired test values in which the control variability can be relatively high. I'd like to answer whether or not the the test values have increased relative to controls. ...
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Hypothesis Testing (normality violated)
I have two sets of data, SetA and SetB - they are metrics of the same group from different time or paired. SetA score at 10 am and SetB score at 5 pm, same person (30 of them).
I want to check if the ...
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What is the best way to compare means across groups if the data is not normally distributed, and sample sizes across groups can vary?
I am quite new to statistical analysis and have what is probably a newbie question. I have a dataset that contains year and state data for two different groups. I am trying to compare the group means ...
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How do you determine if a given method for checking normality assumptions is appropriate? [duplicate]
If you intend to run some analysis like an ANOVA or linear regression that assumes normality, how do you determine if a given method for checking normality is appropriate? What kinds of issues should ...
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Testing for difference in means for utility of wealth
Assume you have 2 different investment strategies, A and B. You simulate how A and B perform on the same $N$ time series of returns and compute the resulting utility of wealth. $N$ is large, say ...
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