The UON conducts both face to face (FF) and online (OL) classes that are intended to be identical. Given below are the distributions of the two groups in terms of marks scored in a statistics examination. The modal mark is known for each group and given as 68 for face to face and 64 for online students respectively. Marks 30- 40 40- 50 50- 60 60- 70 70- 80 80 – 90 90-100 Total F.F Students 6 18 12 f1 18 f2 12 100 O.N Students 5 15 f1 22 19 11 f2 100 i. Find the missing frequencies f1 and f2 for each. ii. Based on the mean mark justify who should be rewarded for good performance. iii. Based on Pearson’s second coefficient of skewness, compare and comment on skewness of the two groups,
The UON conducts both face to face (FF) and online (OL) classes that are intended to be identical. Given below are the distributions of the two groups in terms of marks scored in a statistics examination. The modal mark is known for each group and given as 68 for face to face and 64 for online students respectively.
|
Marks |
30- 40 |
40- 50 |
50- 60 |
60- 70 |
70- 80 |
80 – 90 |
90-100 |
Total |
|
F.F Students |
6 |
18 |
12 |
f1 |
18 |
f2 |
12 |
100 |
|
O.N Students |
5 |
15 |
f1 |
22 |
19 |
11 |
f2 |
100 |
i. Find the missing frequencies f1 and f2 for each.
ii. Based on the mean mark justify who should be rewarded for good performance.
iii. Based on Pearson’s second coefficient of skewness, compare and comment on skewness of the two groups,
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