ANOVA estimates 3 sample variances: a total variance based on all the observation deviations from the grand mean, an error variance based on all the observation deviations from their appropriate treatment means, and a treatment variance.
ænˈoʊvə ˈɛstᵻməts θɹˈiː sˈæmpəl vˈɛɹiənsᵻz: ɐ tˈoʊɾəl vˈɛɹiəns bˈeɪst ˌɔn ˈɔːl ðɪ ɑːbzɚvˈeɪʃən dˌiːvɪˈeɪʃənz fɹʌmðə ɡɹˈænd mˈiːn, ɐn ˈɛɹɚ vˈɛɹiəns bˈeɪst ˌɔn ˈɔːl ðɪ ɑːbzɚvˈeɪʃən dˌiːvɪˈeɪʃənz fɹʌm ðɛɹ ɐpɹˈoʊpɹɪət tɹˈiːtmənt mˈiːnz, ænd ɐ tɹˈiːtmənt vˈɛɹiəns.