4.10 A study was conducted to determine the level of agreement between two personnel officers in their ratings of prospective job candidates. The officers rated each of 20 job candidates as unacceptable (A); acceptable (B); or recommended (C). The results are shown in Table 4.14.

a. Compute (by hand) the value of Cohen’s kappa for these data and interpret this value.

b. Obtain (by computer) the 95% confidence interval for Cohen’s kappa and interpret the results.