This allows the experimenter to estimate the ranges of response variable values that the treatment would generate in the population as a whole.
ðɪs ɐlˈaʊz ðɪ ɛkspˈɛɹɪməntɚ tʊ ˈɛstᵻmˌeɪt ðə ɹˈeɪndʒᵻz ʌv ɹᵻspˈɑːns vˈɛɹɪəbəl vˈæljuːz ðætðə tɹˈiːtmənt wʊd dʒˈɛnɚɹˌeɪt ɪnðə pˌɑːpjʊlˈeɪʃən æz ɐ hˈoʊl.