## Appendix D [Power / Sample Size]

Dear mittyri,

THX!
Seems there is no "validity within a set of strict conditions", but rather general validity.
The astonishing fact that the right-hand side may become negative lies in the fact that instead of subtracting
Pr(E1 ∪ E2), which is within 0 ... 1, the upper bound of that probability is used.

Regards,

Detlew