Question #101482
In a study of 32 students grade points averages (GPA) the following data were obtained.construct a frequency distribution using seven classes.(note:A=4, B=03, C=2, D=1, F=0.) (The information in the exercise will be used again for exercise 2-22 and 3-22).
(3.2,1.1,0.6,2.8,2.6,3.0). (2.0,3.5,4.0,2.6,2.3,1.7). (3.3,1.9,3.5,1.6,3.8,4.0). (2.7,1.7,2.3,1.6,2.1,1.2). (2.1,0.8,1.6,2.4,2.9,3.1).
(3.9,2.6).
(3.2,1.1,0.6,2.8,2.6,3.0). (2.0,3.5,4.0,2.6,2.3,1.7). (3.3,1.9,3.5,1.6,3.8,4.0). (2.7,1.7,2.3,1.6,2.1,1.2). (2.1,0.8,1.6,2.4,2.9,3.1).
(3.9,2.6).
Expert's answer
Minimum value of GPA = 0.6
Maximum value of GPA = 4.0
Range = 4.0 - 0.6 = 3.4
Number of classes required = 7
So class width = Range / 7 = 3.4/7 = 0.5
Now sorted data are:
0.6
0.8
1.1
1.2
1.6
1.6
1.6
1.7
1.7
1.9
2.0
2.1
2.1
2.3
2.3
2.4
2.6
2.6
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.5
3.5
3.8
3.9
4.0
4.0
Frequency distribution:
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