How do you find the sample size for an independent t-test?
How do you find the sample size for an independent t-test? For the independent samples T-test, Cohen's d is determined by calculating the mean difference between your two groups, and then dividing the result by the pooled standard deviation. Cohen's d is the appropriate effect size measure if two groups have similar standard deviations and are of the same size. What is a good sample size for t-test? The two-sample t-test is valid if the two samples are independent simple random samples from Normal distributions with the same variance and each of the sample sizes is at least two (so...