c. The Result of the Computation of the t test Formula of the Sample
Data of 20022003
The result of the computation of the t test formula by computer shown that the t value is 9.364998928 and d.f: 308.
d. The Result of the Computation of the t test formula of the Total
Sample Data of 20002001 - 20022003
The result of the computation of t test formula by computer shown that the t value is 15.30510017 and d.f: 1038. The detailed
computation can be seen in the appendix.
B. Hypothesis Test
The analysis utilized the inferential statistics, i.e, t test. The result of the t test values are displayed as follows:
1. Hyphothesis Test of the Comparison of the English Achievement
NEM between the Regular Junior High School and the Open Junior High School for the Academic Year 20002001
The comparison between the Regular Junior High School and the Open Junior High School for the academic year 20002001 as the
result of computerized t student can be described as follows: t: 12.90779812 with the d.f: 356 has the p: 0.00 0.01 so it is very
significant for the 5 level of significance. This indicates that the null hypothesis is rejected and the alternative hypothesis is accepted.
2. Hyphothesis Test of the Comparison of the English Achievement
NEM between the Regular Junior High School and the Open Junior High School for the Academic Year 20012002
The comparison between the Regular Junior High School and the Open Junior High School for the academic year 20012002 as the
result of computerized t student can be described as follows: t: 15.01422482; d.f: 370 has the p: 0.00 0.01 so it is very significant
for the 5 level of significance. This indicates that the null hypothesis is rejected and the alternative hypothesis is accepted.
3. Hyphothesis Test of the Comparison of the English Achievement
NEM between the Regular Junior High School and the Open Junior High School for the Academic Year 20022003
The comparison between the Regular Junior High School and
the Open Junior High School for the academic year 20022003 as the result of computerized t student can be described as follows: t:
9.364998928 with the d.f: 308 has the p: 0.00 0.01 so it is very significant for the 5 level of significance. This indicates that the null
hypothesis is rejected and the alternative hypothesis is accepted.
4. Hyphothesis Test of the Comparison of the English Achievement
NEM between the Regular Junior High School and the Open Junior High School for the Academic Year 20002001 - 20022003
The comparison between the Regular Junior High School and the Open Junior High School for the academic year 20002001 -
20022003 as the result of computerized t student can be described as follows: t: 15.30510017 with the d.f: 1038 has the p: 0.00 0.01 so
it is very significant for the 5 level of significance. This indicates that the null hypothesis is rejected and the alternative hypothesis is
accepted.
C. Discussion
