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. 2021 Feb 8;11:3300. doi: 10.1038/s41598-021-82764-6

Table 3.

Sample sizes needed for 80% power in testing Kendall’s τb correlation coefficient at the 5%, 1%, and 0.1% levels (2-sided tests).

τb N (5%) N (1%) N (0.1%)
0.3 40 58 69
0.4 23 33 50
0.5 15 23 30
0.6 11 15 21
0.7 8 11 15