Large differences between observed and expected

Info icon This preview shows pages 20–29. Sign up to view the full content.

View Full Document Right Arrow Icon
Large differences between observed and expected frequency counts suggest that a relationship (interaction) does exist the significance of which is determined by the χ 2 statistic.
Image of page 20

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Chapter 11: Goodness of Fit and Contingency Analysis Category 2 r 1 r 2 Category 1 c 1 c 2 c 3 “Contingency” Table How do you calculate the expected frequencies for each cell? N C R E j i ij 10 15 20 10 50 25 (12.1) (22.9) (22.5) (42.5) (10.4) (19.6) e.g., E 22 = (85)(65) / 130 = 42.5 R 1 = 45 R 2 =85 C 1 = 35 C 2 = 65 C 3 = 30 N =130
Image of page 21