A study was conducted on the percent of total advertising dollars spent by 10 local firms for advertising in the press and on cable television. Results were ranked with a resulting sum of squared differences equal to 128. What is the sum of the differences in ranks?
A)128
B)100
C)0
D)1

Question

Quizplus · Accepted Answer

The sum of the differences in ranks for any set of ranked data is always 0 because for every positive difference there is a corresponding negative difference that cancels it out.

A Study Was Conducted on the Percent of Total Advertising