A scientist collects data to predict the wheat yield (in bushels per acre)based on rainfall (in millimetres).The results are recorded in the table below.
Compute Spearman's rank correlation.Assume that rank ties will have little influence on your result.
A)0.962
B)0.944
C)0.976
D)0.94
E)0.942

Question

A scientist collects data to predict the wheat yield (in bushels per acre)based on rainfall (in millimetres).The results are recorded in the table below. 
Compute Spearman's rank correlation.Assume that rank ties will have little influence on your result.
A)0.962 
B)0.944 
C)0.976 
D)0.94 
E)0.942

Quizplus · Accepted Answer

The formula for computing Spearman's rank correlation coefficient is 1- [(6 x sum of squared differences between ranks)/ (n x (n^2-1))] where n is the number of pairs of data. Using this formula, we get a value of 0.976. Therefore, the best choice is C, which is the closest value to 1, indicating a strong positive correlation between wheat yield and rainfall.

A Scientist Collects Data to Predict the Wheat Yield (In