Additionally, whereas the BioCycle Study had greater racial diversity than comparable studies (3 — 6), our study was limited by different sample sizes among the racial groups, which may have limited our power to detect significant differences in some of our subgroup analyses. (academic.oup.com)
Power analyses for group differences and treatment effects are presented for different sample sizes to guide preclinical and clinical study design. (jci.org)
Both have different sample sizes — qualitative is typically small sample research, while quantitative uses large amounts of data. (educationbusinessuk.net)