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KENDALL’S COEFFICIENT OF CONCORDANCE Purpose, how to compute, how to interpret

Kendall’s coefficient of concordance

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Page 1: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

Purpose, how to compute, how to interpret

Page 2: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

Eto ang sitwasyon

A survey was conducted about the popularity ratings of possible senatorial candidates.

The survey was administered to 3 persons

Page 3: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

Senatorial candidate Ranking from respondent 1

Ranking from respondent 2

A 5 4

B 4 5

C 3 1

D 6 3

E 1 2

F 2 6

G 7 7

Is there an agreement in the ranking of senatorial candidates from two respondents?

What is the significance of knowing if there is an agreement or not?

Page 4: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

It is used to determine the degree of agreement among the raters (judges) in ranking items.

Give examples of research problems that might require Kendall’s coefficient of concordance?

Page 5: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

112

22

2

nnm

dW i

m – number of raters or judges who will do the rankingn – number of items, objects, persons to be ranked

ARd ii

R(i) is the sum of ranks assigned to item i by m judges

n

RA i

10 W

Page 6: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

71.04874

8012W

W Interpretation

0 No agreement

0.10 Weak agreement

0.30 Moderate agreement

0.60 Strong agreement

1.00 Perfect agreement

112

22

2

nnm

dW i

Page 7: Kendall’s coefficient of concordance

KENDALL’S COEFFICIENT OF CONCORDANCE

Prepare for an activity!

Bawal ang sensitive

Bawal ang OA