Question

PLEASE ANSWER ALL THE FOLLOWING QUESTIONS:

1) What shape would you expect for the distribution of scores from a very hard exam for a large class of students?

a) positively skewed

b) negatively skewed   

c) symmetrical

d) normal

2) A distribution is positively skewed. Which is the most probable order for the three measures of central tendency?

a) mean = 60, median = 50, mode = 40

b) mean = 40, median = 50, mode = 60    

c) mean = 40, median = 60, mode = 50

d) mean = 50, median = 50, mode = 50

Answer 1

2) if mean =median=mode then distribution is symmetric ,

If mean> median>mode then distribution is positively skewed ,

If mean< median < mode then distribution is negatively  skewed .

Hence in given example answer is - a) mean=60, median=50, mode =40 .

1) we see in ( example 2) )if mean >median>mode distribution is positively  skewed

in this case if take such data it shows distribution is positively  skewed.

hence ans is a) positively skewed .

[ sorry  for too late reply .]