14. Scores of 8 Students in
Management Statistics
17, 26, 17, 27, 30,
31, 30, 37

15. Scores of 8 Students in
Management Statistics
17
17
26
27
30
30
31
37
N=8

17. Scores of 8 Students in
Management Statistics
17
17
26
27
30
30
31
37
N=8
1
2
3
4
5
6
7
8

19. Scores of 8 Students in
Management Statistics
N /4 = 8/4 = 2
Q1 = (17 + 26)/2
= 21.5

21. Scores of 8 Students in
Management Statistics
3N /4 = 3(8)/4 = 6
Q3 = (30 + 31)/2
= 30.5

23. QD = (Q3 – Q1)/2
= (30.5 – 21.5)/2
= 4.5

26. Q1 = L + (N/4 – CF )/f (i)
where:
L = exact lower limit if the Q1 class
N/4 = locator of the Q1 class
N = total number of scores
CF = cumulative frequency before the Q1
class
i = class size/interval

28. Q3 = L + (3N/4 – CF )/f (i)
where:
L = exact lower limit if the Q3 class
3N/4 = locator of the Q3 class
N = total number of scores
CF = cumulative frequency before the Q3
class
i = class size/interval

29. THANK YOU AND GOD
BLESS!
@GLEChristianS