[经] statistical control chart and variance analysis

tǒng jì kòng zhì tú hé chā yì fēn xī ㄊㄨㄥˇ ㄐㄧˋ ㄎㄨㄥˋ ㄓˋ ㄊㄨˊ ㄏㄜˊ ㄔㄚ ㄧˋ ㄈㄣ ㄒㄧ