An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers
ObjectivesThis paper aims to serve as a useful guide for sample size determination for various correlation analyses that are based on effect sizes and confidence interval width.Materials and MethodsSample size determinations are calculated for Pearson’s correlation, Spearman’s rank correlation, and...
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Korean Academy of Conservative Dentistry
2024-05-01
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| Series: | Restorative Dentistry & Endodontics |
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| Online Access: | http://www.rde.ac/upload/pdf/rde-49-e21.pdf |
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| author | Mohamad Adam Bujang |
| author_facet | Mohamad Adam Bujang |
| author_sort | Mohamad Adam Bujang |
| collection | DOAJ |
| description | ObjectivesThis paper aims to serve as a useful guide for sample size determination for various correlation analyses that are based on effect sizes and confidence interval width.Materials and MethodsSample size determinations are calculated for Pearson’s correlation, Spearman’s rank correlation, and Kendall’s Tau-b correlation. Examples of sample size statements and their justification are also included.ResultsUsing the same effect sizes, there are differences between the sample size determination of the 3 statistical tests. Based on an empirical calculation, a minimum sample size of 149 is usually adequate for performing both parametric and non-parametric correlation analysis to determine at least a moderate to an excellent degree of correlation with acceptable confidence interval width.ConclusionsDetermining data assumption(s) is one of the challenges to offering a valid technique to estimate the required sample size for correlation analyses. Sample size tables are provided and these will help researchers to estimate a minimum sample size requirement based on correlation analyses. |
| format | Article |
| id | doaj-art-04f5402b766f4ff1b6cd3ba2a15d1fea |
| institution | Kabale University |
| issn | 2234-7658 2234-7666 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | Korean Academy of Conservative Dentistry |
| record_format | Article |
| series | Restorative Dentistry & Endodontics |
| spelling | doaj-art-04f5402b766f4ff1b6cd3ba2a15d1fea2025-08-20T03:29:18ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662024-05-01492e2110.5395/rde.2024.49.e211104An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchersMohamad Adam BujangObjectivesThis paper aims to serve as a useful guide for sample size determination for various correlation analyses that are based on effect sizes and confidence interval width.Materials and MethodsSample size determinations are calculated for Pearson’s correlation, Spearman’s rank correlation, and Kendall’s Tau-b correlation. Examples of sample size statements and their justification are also included.ResultsUsing the same effect sizes, there are differences between the sample size determination of the 3 statistical tests. Based on an empirical calculation, a minimum sample size of 149 is usually adequate for performing both parametric and non-parametric correlation analysis to determine at least a moderate to an excellent degree of correlation with acceptable confidence interval width.ConclusionsDetermining data assumption(s) is one of the challenges to offering a valid technique to estimate the required sample size for correlation analyses. Sample size tables are provided and these will help researchers to estimate a minimum sample size requirement based on correlation analyses.http://www.rde.ac/upload/pdf/rde-49-e21.pdfconfidence intervalcorrelationparametric and non-parametricsample size |
| spellingShingle | Mohamad Adam Bujang An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers Restorative Dentistry & Endodontics confidence interval correlation parametric and non-parametric sample size |
| title | An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers |
| title_full | An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers |
| title_fullStr | An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers |
| title_full_unstemmed | An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers |
| title_short | An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers |
| title_sort | elaboration on sample size determination for correlations based on effect sizes and confidence interval width a guide for researchers |
| topic | confidence interval correlation parametric and non-parametric sample size |
| url | http://www.rde.ac/upload/pdf/rde-49-e21.pdf |
| work_keys_str_mv | AT mohamadadambujang anelaborationonsamplesizedeterminationforcorrelationsbasedoneffectsizesandconfidenceintervalwidthaguideforresearchers AT mohamadadambujang elaborationonsamplesizedeterminationforcorrelationsbasedoneffectsizesandconfidenceintervalwidthaguideforresearchers |