c:ms:2026:lecture_note_week_05
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| Both sides previous revisionPrevious revision | |||
| c:ms:2026:lecture_note_week_05 [2026/04/01 17:41] – [Two sample t-test] hkimscil | c:ms:2026:lecture_note_week_05 [2026/04/01 17:44] (current) – [Two sample t-test] hkimscil | ||
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| Line 581: | Line 581: | ||
| E \left[ \overline{X} - \overline{Y} \right] & = & E \left[ \overline{X} \right] - E \left[ \overline{Y} \right] \\ | E \left[ \overline{X} - \overline{Y} \right] & = & E \left[ \overline{X} \right] - E \left[ \overline{Y} \right] \\ | ||
| V \left[ \overline{X} - \overline{Y} \right] & = & V \left[ \overline{X} \right] + V \left[ \overline{Y} \right] \\ | V \left[ \overline{X} - \overline{Y} \right] & = & V \left[ \overline{X} \right] + V \left[ \overline{Y} \right] \\ | ||
| - | & = & \frac {\sigma_{X}} {n_{X}} + \frac {\sigma_{Y}} {n_{Y}} \\ | + | & = & \displaystyle \dfrac |
| \end{eqnarray*} | \end{eqnarray*} | ||
c/ms/2026/lecture_note_week_05.txt · Last modified: by hkimscil