Activity 1 (Prefinal)
1. Find the mean of all the grades of Mark in his Engineering course if his grades are as follows:
English
90
Calculus
78
Physics
87
History
89
Statistics 83
2. Find the median of the measured height of all the athletes of the YMCA University given
below:
181 211 189 200 206 195 188
189
3. Given the following FDT, determine the:
a. Variance
b. Standard Deviation
Class Limit
Frequency
Class Mark
(f)
(X’)
Class Boundaries
Less Than Cumulative
Frequency
(<f)
15 – 25
10
20
15.5 – 25. 5
10
26 – 36
8
31
25.5 - 36. 5
18
37 – 47
8
42
36.5 – 47. 5
26
48 – 58
14
53
47.5 – 58.5
40
59 – 69
15
64
58.5 – 69.5
55
70 – 80
18
75
69.5 – 80.5
73
81 – 91
24
86
80.5 – 91.5
97
92 – 102
3
97
91.5 – 102.5
100