Q.1. The model grade in a Class-A is 83, the mean grade is 74 and the median grade is 77. In a

Class-B, the model grade is 71, the mean 80 and the median 77:

(a) Draw a curve representing each class. Place the measurements in their proper relative

positions on the horizontal axis.

(b) Would it be possible to have more than one-half of the students in the Class-A to receive

less than the mean grade? Explain it.

(c) Would it be possible to have more than one-half to the students in the Class-B to receive

less than the mean grade? Explain it.

(d) If standard deviations were calculated for each of these classes, how could the two

standard deviations be compared when the mean is different in each class?