Confidence Interval Confidence Level. Calculation of the Sample Size. If so compute the sample size for r 025 or even smaller.
I am running Pearsons correlation on an overall sample of 400 respondents.
Here I would also like to reference a paper on At what sample size do correlations stabilize for which results indicate that in typical scenarios the sample size should approach 250 for stable estimates. Sample Size Requirement for One Correlation Test with Power 90 Alpha 005 Sample Size Requirement for Inequality Tests for Two Correlations with Power 80 Alpha 005. Correlation Coefficient x i- mean x y i-mean y x i-mean x2 y i-mean y2 Where x i value of x in the sample. For example if you use a confidence interval of 4 and 47 percent of your sample picks an answer you can be sure that if you had asked the question of the entire relevant.