merate researchers in the social and biosciences. (These commercial pack-
ages all contain power analysis options.) There are also many freeware pack-
ages specifically dedicated to power analysis, but such packages are more
ephemeral (see Helberg, 2004, for a listing).
4. To understand how to report an evaluation, know the CIF standard (INCITS,
2001). In addition, use plenty of common sense to not get bogged down
in formalities and details and to not be misled by quick fixes. Remember
step 6.
The alternative, of course, is not to do any testing at all.
REFERENCES
Aron, A., and Aron, E. (1994). Statistics for Psychology. Englewood Cliffs, NJ: Prentice ...