ABSTRACT
The following table shows the marks gained by 140 students in some tests on reasoning. The marks are called variables and the number of students attaining to each interval of marks is the frequency. https://www.niso.org/standards/z39-96/ns/oasis-exchange/table">
Variables
0
½−1
1½−2
2½−3
3½−4
4½−5
5½−6
Frequency
2
11
36
40
31
14
6
