3. [10]The following data is a sample of salaries for company XYZ.
69,5
12
37,5
50
68,2
66
47,8
86
36,6
13
40,1
31
54,2
31
50,3
80
61,1
40
54,0
91
51,0
60
51,2
28
46,0
44
55,9
61
37,8
48
46,9
78
57,6
83
68,3
97
57,4
73
41,7
98
51,0
74
41,8
98
49,4
06
55,7
16
60,4
63
Find:
a)
Mean
51,713 [2]
b)
Median
51,074 [2]
c)
Standard Deviation
9,523 [1]
d)
Variance
90,686,329 [1]
e)
Range
32,899 [1]
f)
Interquartile Range
13,607 [1]
g)
First quartile
43,971 [1]
h)
Third quartile
57,578 [1]
[get 50% of marks if the correct formula is used but the wrong answer is obtained]