Two-sample t test
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Two-sample t testQuestions
- What conditions must be met for conducting a two-sample t test for the means?
- What is the difference between using the pooled variance and the unpooled variance in a two-sample t test for means?
- Why is a pooled standard deviation used for a two sample t-test?
- What is a pooled variance?
- What is the mathematical formula for the pooled variance of two populations?
- Can a two-sample t-test be used if the samples are of a different size?
- Can a two-sample t-test be used if the samples have different variances?
- How do you adjust a two-sample t-test to accomodate samples of different sizes?
- What is Welch's t-test?
- When is Welch's t-test used?
- What does Welch's t-test measure?
- How are two-sample t-tests different from two sample z-tests?
- How do you find the P value for a two tailed test with n=21 and test statistic t =1.557?
- What is a paired and unpaired t-test? What are the differences?
- How do you find a p value if n = 10 for a two-tailed test, and the test statistic t = 2.52?