Question: Problem 4

Two pathologists each examined coded material from the same 100 tumors and classified the material as malignant or benign. Pathologist A found that 18 are malignant and pathologist B found 10 malignant cases. Both pathologists agreed on 8 cases as malignant. The investigator conducting the study is interested in determining the extent to which the pathologists differ in their assessments of the tumor material. Form an appropriate 2 by 2 table and test the numm hypothesis of no difference at the 0.05 significance level.