iPhone Screenshots

Description

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.

What’s New

Version 2.5

- Updated to account for latest iOS.

Information

Seller
Michael YOUNG
Size
2.6 MB
Category
Education
Compatibility

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

Languages

English

Age Rating
Rated 4+
Copyright
Copyright © 2011 Michael S. Young
Price
$1.99

Supports

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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