Although the numerical output of a print() statement with deviations from default level (of confidence) on a powerCurve is correct, the verbal output is incorrect as it always reads "(95% confidence interval)", no matter of the chosen level.
E.g.
print(my_powerCurve, level=0.9);
seems to yield the correct 90% confidence intervals around all breaks, however, the verbal output still reads "(95% confidence interval)" while it should read "(90% confidence interval)".
Although the numerical output of a print() statement with deviations from default level (of confidence) on a powerCurve is correct, the verbal output is incorrect as it always reads "(95% confidence interval)", no matter of the chosen level.
E.g.
print(my_powerCurve, level=0.9);
seems to yield the correct 90% confidence intervals around all breaks, however, the verbal output still reads "(95% confidence interval)" while it should read "(90% confidence interval)".