About Quick Mean Difference
The mean difference is a measure of statistical dispersion between means of two independent samples. This app tests the hypothesis that the means, μ, of two samples are equal at some level of probablility, p. The relevant...
The mean difference is a measure of statistical dispersion between means of two independent samples.
This app tests the hypothesis that the means, μ, of two samples are equal at some level of probablility, p. The relevant statistic is the Student's t-test for the appropriate probability and degrees of freedom, df.
The critical value of the t-test for 5% probability at 30 degrees of freedom is shown as t(0.05, 30).
There are three assumptions imbedded in this test. First, the samples must be randomly generated. Second, the samples must be independently sampled meaning that the inclusion of one subject does not influence the probability of selecting any other member of the population. Third, the population variances, or standard deviations as input into this app, of the two samples, A and B, are presumed to be equal.
Feb 4, 2022
Version 3.0
- Updated to accommodate newest iOS.
- Code simplifications and revisions.
Previous Versions
Here you can find the changelog of Quick Mean Difference since it was posted on our website on 2016-11-04 23:02:59.
The latest version is 3.0 and it was updated on 2024-04-22 08:51:15. See below the changes in each version.
Quick Mean Difference version 3.0
Updated At: 2022-02-04
Changes: Feb 4, 2022 Version 3.0
- Updated to accommodate newest iOS.
- Code simplifications and revisions.
Quick Mean Difference version 2.5
Updated At: 2018-12-20
Changes: Dec 20, 2018 Version 2.5
- Updated to account for latest iOS.
Quick Mean Difference version 2.4
Updated At: 2011-12-01
Quick Mean Difference version 2.5
Updated At: 1970-01-01
Changes: 20 déc. 2018 Version 2.5
- Updated to account for latest iOS.
Quick Mean Difference version 2.5
Updated At: 1970-01-01
Changes: 2018年12月20日 Version 2.5
- Updated to account for latest iOS.
Disclaimer
Official App Store Link
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