» Sample Size Calculator

Sample Size Calculator (web)

Pearson's Correlation - Hypothesis Testing¹

Expected correlation (r):
Significance level (α): Two-tailed
Power (1 - β): %
Expected dropout rate: %

Sample size, n =
Sample size (with 10% dropout), n_drop =

Pearson's Correlation - Estimation²

Expected correlation (r):
Precision (± expected):
Confidence level 100(1 - α): %
Expected dropout rate: %

Sample size, n =
Sample size (with 10% dropout), n_drop =

References:

¹Machin, D., Campbell, M. J., Tan, S. B, & Tan, S. H. (2009). Sample size tables for clinical studies (3rd eds.). West Sussex, UK: John Wiley & Sons Ltd.

²Moinester, M., & Gottfried, R. (2014). Sample size estimation for correlations with pre-specified confidence interval. The Quantitative Methods for Psychology, 10(2), 124-130. [Equation 8]

Suggested reference:

APA: Arifin, W. N. (). Sample size calculator (web). Retrieved from http://wnarifin.github.io

Vancouver: Arifin WN. Sample size calculator (web) [Internet]. [cited ]. Available from: http://wnarifin.github.io

Sample Size Calculator by Wan Nor Arifin is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

© Wan Nor Arifin 2017-