A two sample z-test is used to test whether two population means are equal. This test assumes that the standard deviation of each…
Hypothesis Testing
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- Hypothesis TestingStatisticals Tutorials
One Sample Z-Test: Definition, Formula, and Example
by Tutor AspireA one sample z-test is used to test whether the mean of a population is less than, greater than, or equal to some…
- Hypothesis TestingStatisticals Tutorials
Two Proportion Z-Test: Definition, Formula, and Example
by Tutor AspireA two proportion z-test is used to test for a difference between two population proportions. This tutorial explains the following: The motivation for performing…
- Hypothesis TestingStatisticals Tutorials
One Proportion Z-Test: Definition, Formula, and Example
by Tutor AspireA one proportion z-test is used to compare an observed proportion to a theoretical one. This tutorial explains the following: The motivation for performing…
- Hypothesis TestingStatisticals Tutorials
Two Sample t-test: Definition, Formula, and Example
by Tutor AspireA two sample t-test is used to determine whether or not two population means are equal. This tutorial explains the following: The…
- Hypothesis TestingStatisticals Tutorials
One Sample t-test: Definition, Formula, and Example
by Tutor AspireA one sample t-test is used to test whether or not the mean of a population is equal to some value. This tutorial explains…
- Hypothesis TestingStatisticals Tutorials
How to Perform the Wilcoxon Signed Rank Test
by Tutor AspireThe Wilcoxon Signed Rank Test is the non-parametric version of the paired t-test. It is used to test whether or not there is a…
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A statistical hypothesis is an assumption about a population parameter. For example, we may assume that the mean height of a male…
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A Mann-Whitney U test (sometimes called the Wilcoxon rank-sum test) is used to compare the differences between two independent samples when the…
- Hypothesis TestingStatisticals Tutorials
Paired Samples t-test: Definition, Formula, and Example
by Tutor AspireA paired samples t-test is used to compare the means of two samples when each observation in one sample can be paired…