ADM 2304 Study Guide - Confidence Interval

• School: University of Ottawa
• Department: Administration
• Course: ADM 2304
• Professor: Suren Phansalker

Document Summary

X not too skewed if n < 30 if n 30. = * if n1 < 30 or n2 < 30. Assumptions: (a) if n1 30, and n2 30, then x not too skewed in both populations; (b) if n1 < 30 or n2 < 30, then x approximately normal in respective population. Treat as single sample and calculate d-bar and sd. 0 d s d n or d t. 2 s d n based on n - 1 d. f. The pop"n of differences is normally distributed if n < 30. Differences are not too skewed if n 30. * see black, business statistics, 5th ed. , p. 358. Assumptions: np >= 5 and nq >= 5. *if p0 = 0, this is qp qp n.