Table 1 Power analysis for CCL and WAG in young and old probands
Two-group Satterthwaite t-test of equal means (unequal variances) (unequal n's) | ||
|---|---|---|
CCL: young vs. old | WAG: young vs. old | |
Test significance level, α | 0.050 | 0.050 |
1- or 2-sided test | 2 | 2 |
Group 1 mean, μ1 | 9.350 | 2.990 |
Group 2 mean, μ2 | 9.630 | 3.430 |
Difference in means, μ1–μ2 | − 0.280 | − 0.440 |
Group 1 standard deviation, σ1 | 1.240 | 1.190 |
Group 2 standard deviation, σ2 | 1.480 | 1.530 |
Power (%) | 50 | 86 |
n1 | 320 | 320 |
n2 | 144 | 144 |