Kendall's

coefficient of concordance (w) was 0.677, indicating seemingly strong consensus on these barriers.

Kendall's

coefficient of concordance was used to rank the traits consumers consider in their preference for locally produced rice.

According to the table below (Table 1), the index/result of Kendall's

coefficient of concordance was W = 0.143 (chosen significant level a = 0.05).

3: Homogeneous groups for incidence of derived rules in examined files File Incidence Mean 1 2 3 A1 0.449 *** B1 0.500 *** A2 0.795 *** B2 0.987 *** Kendall

Coefficient of Concordance 0.37022 Source: own Tab.

W-Kendall

coefficient of concordance is a method of examining the concordance between assessments performed by competent examiners such as experienced doctors, tutors, and so forth.

The observation of a highly significant Kendall

coefficient of concordance including the above variables suggests a coherent and coordinated response in this process.

In a decreasing order of weights it is possible to rank estimates of each expert and to calculate the

coefficient of concordance. Results of the ranking of indices [e.sub.ik] are given in Table 4.

The consistency of the opinions of experts can assess the magnitude of the

coefficient of concordance. The

coefficient of concordance varies in the range of 0 < W <1:

File Incidence 1 2 3 A1 0.624 *** A2 0.772 *** A3 0.881 *** Kendall 0.19459

Coefficient of Concordance File Incidence 1 2 3 B1 0.673 *** B2 0.802 *** B3 0.970 *** Kendall Coefficient of 0.19773 Concordance Table 4.

It is convenient to calculate average rank [[bar.R].sub.j] and concordance coefficient (Kendall's

coefficient of concordance (Chua, Li 2000)) W by a matrix, the structure of which is presented in Table 2.

Reliability of expert evaluation has been calculated by establishing the

coefficient of concordance W for individual groups of factors.

In Table 3, the significance value of Kendall's

coefficient of concordance is 0.000 (i.e.