When to use pooled variance t-test?
Understand the Problem
The question is asking about the appropriate circumstances or conditions under which a pooled variance t-test should be utilized for statistical analysis. It seeks to clarify the specific scenarios that justify its use over other types of t-tests.
Answer
When variances are assumed equal.
The pooled variance t-test is used when the variances of the two groups are assumed to be equal.
Answer for screen readers
The pooled variance t-test is used when the variances of the two groups are assumed to be equal.
More Information
The pooled variance t-test combines the variances of the two samples to estimate a common variance when the populations are assumed to have equal variance.
Tips
A common mistake is to use the pooled variance t-test without checking if the variances of the two samples are approximately equal.
Sources
- Pooled Variances - STAT ONLINE - online.stat.psu.edu
- When to use pooled variance - math.stackexchange.com
- Pooled Two-sampled t-test (Assuming Equal Variances) - stats.libretexts.org
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