送交者: wasguru 于 2005-12-02, 00:30:10:
回答: 如内文 由 雪泥 于 2005-12-01, 21:04:35:
You didn't describe how she analyzed the collected data. Did she take the composition of age, gender, race, etc. into account?
Plus, you didn't describe how she sampled the general public. She must used a different sampling scheme, since stratifying the general public by major is not likely.