79
material A
2
B
1
; and 8 The data of the students having low learning motivation who are taught using Textbook material A
2
B
2
. Each group is then described for its data description which covers the
highest score, lowest score, range, mean, median, mode, standard deviation, and the diagrams of both polygon and histogram. The data of each group are
described as follows:
1. The data of the students taught using Commputer Based
Communication material A
1
The descriptive analysis of the data shows that the highest score is 92 and 64 for the lowest score with the range 28. The mean is 77.33, the
median is 76.83, the mode is 76.27, and the standard deviation is 7.76. Then, the frequency distribution, histogram, and polygon can be seen in the
table 9 and figure 9 as follows: Table 4.1. Frequency distribution of A
1
No Class limit
Frequency fi
Mid Point Xi fi.Xi
Xi
2
fi.Xi
2
1 64-68
5 66
330 4356
21780 2
69-73 4
71 284
5041 20164
3 74-78
9 76
684 5776
51984 4
79-83 5
81 405
6561 32805
5 84-88
4 86
344 7396
29584 6
89-93 3
91 273
8281 24843
∑ 30
2320 37411 181160
80
Figure 4.1. Histogram and polygon of Data A
1
2. The data of the students taught using Textbook material A
2
The result of the computation shows that the highest score is 85, the lowest score is 64, and the range is 21. The mean score of the data is
74.0, the median is 72.5, the mode is 72.16, and the standard deviation is 6.10. Then, the frequency distribution, histogram and polygon are
presented in the table 10 and figure 10 as follows: Table 4.2. Frequency distribution of A
2
No Class limit Frequency
fi Mid Point
Xi fi.Xi
Xi
2
fi.Xi
2
1 64-67
5 65.5
327.5 4290.25 21451.3 2
68-71 6
69.5 417
4830.25 28981.5 3
72-75 8
73.5 588
5402.25 43218
4 76-79
4 77.5
310 6006.25
24025 5
80-83 5
81.5 407.5 6642.25 33211.3
6 84-87
2 85.5
171 7310.25 14620.5
∑ 30
2221 3448.5
165508
2 4
6 8
10
63.5 68.5 73.5 78.5 83.5 88.5 93.5
81
Figure 4.2. Histogram and polygon of Data A
2
3. The data of the students having high learning motivation B
1
The descriptive analysis of the data shows that the highest score is 92, the lowest score is 63, and the range is 29. The mean is 77.33, the
median is 80.5, the mode is 81.58, and the standard deviation is 8.17. Next, the frequency distribution, histogram, and polygon are presented in the
table 11 and figure 11 as follows: Table 4.3. Frequency distribution of B
1
No
Class limit Frequency
fi Mid Point
Xi fi.Xi
Xi
2
fi.Xi
2
1 63-67
6 65
390 4225
25350 2
68-72 3
70 210
4900 14700
3 73-77
3 75
225 5625
16875 4
78-82 10
80 800
6400 64000
5 83-87
5 85
425 7225
36125 6
88-92 3
90 270
8100 24300
∑ 30
2320 36475 181350
1 2
3 4
5 6
7 8
9
1
63.5 67.5 71.5 75.5 79.5 83.5 87.5
