A professor grades 120 research papers and reports that the average score was 80%. What do we know about the sum of the differences of these 120 scores from their mean of 80%?
A. The sum of the differences is minimal.
B. The sum of the differences is 80%, the same as the mean.
C. The sum of the differences is equal to zero.
D. It is impossible to know without knowing each of the 120 scores.
Ans: C
You might also like to view...
In the event of a disaster or serious emergency, teachers should be assigned specific___________
Fill in the blank(s) with correct word
Children's need for privacy can best be provided for by
a. informing parents of how important it is so they can provide for it at home where it is more appropriate. b. creating private spaces in your class by using big boxes, a cover over a table, and secluded corners for one or two children. c. ensuring children have their quiet private time at rest time. d. telling children not to bother others who wish to be alone.
According to Gagné, the importance of feedback is that it
a. confirms learner expectations. b. increases motivation. c. is an external condition of learning. d. provides a positive experience.
An important criterion in evaluating a job offer is the scope of the job
Indicate whether the statement is true or false