A repeated-measures study uses a sample of n = 15 participants to evaluate the mean differences among four treatment conditions. In the analysis of variance for this study, what is the value for dfbetween treatments?

Jackie is always buying several packs of baseball cards, but only a fraction of those packs actually add new cards to her collection. She is likely on a __________

a) fixed-ratio. b) variable-ratio. c) fixed-interval. d) variable-interval.

Which term describes people who are born with mixtures of sexual characteristics?

a) bisexuals b) intersexes c) homosexuals d) transsexuals