Consider the table below:
Classes
(Mass)
(kg)
30.00<
40.00
40.00<
50.00
50.00< A
60.00
60.00< 17
70.00
Frequency, Cumulative Midpoint, fm
Frequency
f
A. 153200
OB. 178200
O C. 183700
OD. 196500
11
Σ
60
The value of Zfm² is:
B
43
60
m
35.00
45.00
55.00
C
140
495
1540
fm²
4900
22275
84700
1105 71825