Question 5:
Table 1 shows the deviation from the mean mark scored by Nora in a monthly test. The deviation from the mean mark for Sejarah has been left out.
Table 1
It is given that her mean mark for all the 9 subjects is 60.
Find
(a) the median mark, [4 marks]
(b) the standard deviation. [3 marks]
Solution:
(a)
Mark for Sejarah = 90
38, 40, 41, 54, 62, 62, 70, 83, 90
Median mark = 62
(b)
Table 1 shows the deviation from the mean mark scored by Nora in a monthly test. The deviation from the mean mark for Sejarah has been left out.
Table 1It is given that her mean mark for all the 9 subjects is 60.
Find
(a) the median mark, [4 marks]
(b) the standard deviation. [3 marks]
Solution:
(a)
Mark for Sejarah = 90
38, 40, 41, 54, 62, 62, 70, 83, 90
Median mark = 62
(b)