Suppose a researcher has trained two observers to rank participants according to their level of frustration when trying to solve a puzzle.What statistic should be used to determine the extent to which the two observers agree in their rankings of frustration?
A)The Pearson correlation coefficient
B)The Spearman rank-order correlation coefficient
C)The point-biserial correlation coefficient
D)The nonlinear correlation coefficient

Question

Quizplus · Accepted Answer

The best choice in this scenario would be the Spearman rank-order correlation coefficient. This statistic is used to measure the strength and direction of the association between two sets of ranked data. In this case, the two observers are ranking participants according to their level of frustration, which can be considered ranked data. Therefore, the Spearman rank-order correlation coefficient would be the most appropriate statistic to use to determine the extent to which the two observers agree in their rankings.

Suppose a Researcher Has Trained Two Observers to Rank Participants