Balanced experiments (those with an equal sample size for each treatment) are relatively easy to interpret; unbalanced experiments offer more complexity.
bˈælənst ɛkspˈɛɹɪmənts ðoʊz wɪð ɐn ˈiːkwəl sˈæmpəl sˈaɪz fɔːɹ ˈiːtʃ tɹˈiːtmənt ɑːɹ ɹˈɛlətˌɪvli ˈiːzi tʊ ɪntˈɜːpɹɪt; ʌnbˈælənst ɛkspˈɛɹɪmənts ˈɔfɚ mˈoːɹ kəmplˈɛksᵻɾi.