Table 2.7 gives the grades on a quiz for a class of 40 students.
(a) Arrange these grades (raw data set) into an array from the lowest grade to the highest grade.
(b) Construct a table showing class intervals and class midpoints and the absolute, relative, and cumulative frequencies for each grade.
(c) Present the data in the form of a histogram, relative-frequency histogram, frequency polygon, and ogive.
Table 2.7 Grades on a Quiz for a Class of 40 Students
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7
|
5
|
6
|
2
|
8
|
7
|
6
|
7
|
3
|
9
|
|
10
|
4
|
5
|
5
|
4
|
6
|
7
|
4
|
8
|
2
|
|
3
|
5
|
6
|
7
|
9
|
8
|
2
|
4
|
7
|
9
|
|
4
|
6
|
7
|
8
|
3
|
6
|
7
|
9
|
10
|
5
|