CHAPTER IV RESEARCH FINDING AND DISCUSSIONS

Transcription

1 CHAPTER IV RESEARCH FINDING AND DISCUSSIONS A. Descrpton of Research Fndng. The Implementaton of Learnng Havng ganed the whole needed data, the researcher then dd analyss whch refers to the statstcal data analyss to fnd out whether or not there s a dfference of students understandng on vocabulary of Adjectve between students taught usng song and students taught wthout usng song. The mplementaton of ths research was dvded nto two classes. They were expermental class (VIII B) and control class (VIII C). Before the actvtes were conducted, the researcher explaned the materal and the lesson plan of learnng. In ths research, there were two tests; pre-test and post-test. The pre-test was gven before the students follow the learnng process that was provded by the researcher. The researcher wll gve pre-test to both classes to know how understand the students n the lesson. The test was gven to the students was lstenng test. The teacher asked the students to lsten some songs and texts to fll the blanks of vocabulary of Adjectve.. In treatment, the researcher wll teach the control class by usng conventonal method and expermental class by usng song. After dong the treatment, the researcher wll gve to both classes post-test that the students ha to revse ther exercse to revew fll n the blanks of vocabulary of Adjectve s approprate wth what they lsten. The post-test obtaned the data that wll be analyzed.. Analyss of Pre requste test Before the researcher determnes the sample, the wrter should conduct a normalty and homogenety test by choosng two classes. They are between class VIII B (Expermental Class) between class VIII C 7

2 (Control Class) as the sample. Ths test conducted to determne whether the sample are homogenous or not. After conducted the test, data analyss was carred out to fnd out the homogenety of the sample. The Data Analyss of Pre-test Value of the Expermental and the Control Class Table 4. The lst of pre-test value of the expermental and the control classes Control Class Expermental Class No Code Code Pre test Post test Pre test Post test C- C 80 E C E C E C E C E C E C E C E C E C E C E C E C E C E C E C E C E C E C E

3 0 C E C E C E C E C E C E C E C E C E Sum Average Varance Standard Devaton Mnmum score Maxmum score Range Length of the class From the table above, we know that there were 8 students n both expermental class and control class. So, there were 56 students from two classes. The mnmum and maxmum score of pre test n control class were 50 and 70. And the mnmum and maxmum score of post test n control class were 53 and 73. In expermental class, the mnmum score both of pre test and post test were 53 and 73. And the maxmum score, both of pre test and post test were 73 and 00. The average of control class n pre test and post test were 60.4 and 8.7. And the average of expermental class n pre test and post 9

4 test were and We conclude that there were dfferent student s achevement score n pre test and post test, both of expermental and control classes were ncreasng score. a. Search for the normalty of ntal data n the control class and the expermental class. The normalty test s used to know whether the data obtaned s normally dstrbuted or not. Test data of ths research to fnd out the dstrbuton data s used normalty test wth ch square. ) The result of pre request test of control class Based on the result of pre requste of Class VIII C as control class, the hghest score acheved s 73 and lowest s 50. It means that the range (R)= 3, the number of class s 6, and the length of the class s 4. The result of the calculaton above s, then nputted nto the frequency dstrbuton as follow: Table 4.. Normalty pre test of control class Class f X X f.x f.x Sum The table descrbe that there are sx nterval classes of pre test n control class. The mnmum score s 50 and maxmum score s 73. The length of each class s 4. f s frequency means students 30

5 score of expermental class n pre test of each nterval class. X s mddle score of each nterval class.. a) Calculatng of the average X ( x ) : X _ = f f x = 690 = b) Calculate varance S = n f χ ( fχ ) n( n ) = (690) 8(8-) = c) Calculate standard devaton = = Table 4.3. Dstrbuton frequency of control group Class Bk Z P(Z ) , , , ,65 6, ,0 Wde Area E O ( O E ) E 3

6 65, , , , , #REF! X² = For = 5%, wth dk = 6-3= 3 t s obtaned X² tabel = 7.8. If X² < X² table the data s n the normal dstrbuton, because of X² count = s lower than X² tabel = 7.8, based on the result above the data s the normal dstrbuton. ) The result of pre request test of expermental class. Based on the result of pre requste of Class VIII B as expermental class, the hghest score acheved s 73 and lowest s 53. It means that the range (R)= 0, the number of class s 6, and the length of the class s 4. The result of the calculaton above s, then nputted nto the frequency dstrbuton as follow: Table 4.4. Normalty test of pre test of expermental class. Class f X X f.x f.x Sum

7 The table descrbe that there are sx nterval classes of pre test n expermental class. The mnmum score s 53 and maxmum score s 73. The length of each class s 4. f s frequency means students score of control class n pre test of each nterval class. X s mddle score of each nterval class.. a) Calculatng of the average X ( x ) : X _ = f f x = 786 = b) Calculate varance S = n fχ n( n ) ( fχ ) = (786) 8.(8-) = c) Calculate standard devaton = = Table 4.5. Dstrbuton frequency of expermental group Class Bk Z P(Z ) Wde Area E O ( O E ) E

8 #REF! X² = For = 5%, wth dk = 6 3 = 3 t s obtaned X² tabel = 7,8. If X² count < X² table, so the data s n the normal dstrbuton, because of X² count = < X² table = 7,8, so the data s the normal dstrbuton. Based on the result of the normalty test of expermental class and control class, t can be seen that two classes are normal dstrbuton, because X² count < X² table, so the data s n the normal dstrbuton. b. Search for the homogenety of ntal data n the control class and expermental class. Homogenety test s used to fnd out whether the group s homogeneous or not. The data of ths research uses Bartlett test. Hypothess: H o : σ = σ H a : σ σ Table 4.6. Homogenety test of pre test of expermental and control classes 34

9 Varants sources Control class Experment class Sum N Varant (S ) Standard devaton(s) Sample Dk Table 4.7 Bartlett Test /dk S Log S dk.log S dk * S Sum ) The merger varant of populaton group ( n ) S S = n ( ) = = ) The value of B B = (Log S ) S (n - ) = = ) X value = (Ln 0) { B - S(n-) log S} =,30585 ( ) = For = 5% wth dk = k- = - = s obtaned X table = 3,84. If X count< X table so the data s homogeneous. Because X count = s lower than X table = 3, 84, so the data s homogeneous. 35

10 c. Searchng for the average smlarty of the ntal data between the control and expermental class. To analyze the smlarty of average, the researcher uses t-test. Table4.8 The average smlarty test of pre test of the expermental and control classes x s Sampel N S T Based on the computaton of the homogenety test, the expermental class and control class have same varance. So, the t test formula: t( α ) < t < t ( α ) Ho s accepted f Wth =5% and dk = n = n t table =,0094. Because t count =.8554 < t table =.00, so there s a smlarty of average. d. Searchng for normalty data of post test of the control and expermental class ) The result of post test of expermental class Based on the result of post test of Class VIII B as expermental class, the hghest score acheved s 00 and lowest s 73. It means that the range (R) = 7, the number of class s 6, and the length of the class s 5. The result of the calculaton above s, then nputted nto the frequency dstrbuton as follow: Table 4.9 The normalty test table of post test of expermental group 36

11 Class f X X f.x f.x Sum a) Calculatng of the average X ( x ) : X _ = f f x = 43 = b) Calculate varance S = n f χ n( n ) ( fχ ) = (43) 8. (8-) = c) Calculate standard devaton = = Table 4.0. Dstrbuton frequency of expermental group Class Bk Z P(Z ) Wde area E O ( O E ) E 37

12 #REF! X² = For = 5%, wth dk = 6-3= 3 t s obtaned X² tabel = 7,8. If X² count < X² table, so the data s n the normal dstrbuton, because of X² count = < X² table =7, 8, so the data s the normal dstrbuton. ) The result of post test of control class Based on the result of post test of Class VIII C the hghest score acheved s 96 and lowest s 70. It means that the range (R)= 6, the number of class s 6, and the length of the class s 5. The result of the calculaton above s, then nputted nto the frequency dstrbuton as follow Table 4. The Normalty test of post test of control class Class f X X f.x f.x

13 Sum a) Calculatng of the average X ( x ) : X _ = f f x = 33 = b) Calculate varance S = n f χ n( n ) ( fχ ) = (33) 8. (8-) = c) Calculate standard devaton = = Table 4.. Dstrbuton frequency of control class Class Bk Z P(Z ) Wde area E O ( O E ) E

14 #REF! X² = For = 5%, wth dk = 6-3= 3 t s obtaned X² tabel = 7.8. If X² count < X² table, so the data s n the normal dstrbuton, because of X² count = 4.005< X² table =7.8, so the data s the normal dstrbuton. Based on the result of post test of the normalty test of expermental class and control class, t can be seen that classes are normal dstrbuton, because X² count < X² table, so the data s n the normal dstrbuton. e. Search for the homogenety of control class and expermental class. Table 4.3 Homogenty of post test of expermental and control classes Varants Sources CONTROL EXPERIMENT Sum N Varance (S ) Standart devaton (S)

15 Based on the table above, we know that total score, both control and expermental class are 88 and 398. The average of control class and expermental class are 8,7 and Table 4.4. Bartlett test Sample Dk /dk S Log S Sum dk.log S dk * S ) The merger varant of populaton group ( n ) S S = n ( ) = = ) The value of B B = (Log S ) S (n - ) = = ) X value = (Ln 0) { B - S(n-) log S} =,30585 ( ) = For = 5% wth dk = k- = - = s obtaned X table = If X count < X table so the data s homogeneous. Because X count = s lower than X table = 3.84, so the data s homogeneous. f. Testng the smlarty of average between expermental and control class. To analyze the smlarty of average, the researcher uses t-test. 4

16 The hypothess: : µ = µ H o H Where, t = t = Wth : µ > µ s µ µ x = The average of expermental class = The average of control class x + n n s = =.09 ( n ) s + ( n ) n + n s s = ( 8 ) ( 8 ) = Table 4.5 The average smlarty of post test of expermental class and control classes Source of varance Experment Control T Mean Varance (s) N 8 8 s For α = 5% wth dk = = 54 s obtaned =,67 and =.09. 4

17 The test crteron s: H a s accepted f > t table by degrees of freedom of df = n + n ) and by the chance of 0.05 level of sgnfcance. Because > ( t table (.09 >.67 ) t means that H o s rejected and H s accepted. It means that usng song s more effectve than explanaton only n teachng vocabulary of Adjectve. B. Dscusson of the Research Fndngs The technque of teachng s one of the factors that nfluence the result of the study. In the process of teachng, the teachers must choose approprate technque, so the students wll enjoy the lesson. Based on the result of tests, the process of learnng Englsh usng song as a medum to vocabulary of Adjectve n SMP N Gubug n academc year of 0/03 could help the students to understand some words of vocabulary of Adjectve effectvely, so they could mprove ther understandng on vocabulary of Adjectve. Besdes, the students who had been taught usng song felt more fun and enjoy. They were not bored n the classroom durng the process of teachng learnng. Teachng learnng process n the expermental class used song n teachng vocabulary of Adjectve. In the process of teachng learnng, the teacher gave a worksheet to the students; there s a song lyrc that blank words of adjectve. The teacher played the musc. And the students had to lsten the song carefully and they have to fll blank words of song lyrc n the worksheet. In the end of the learnng, the teacher took worksheets of the students and reflected the materal that had been learnt. Meanwhle, teachng learnng process n the control class was mplemented through conventonal method. In the process of teachng learnng, the teacher explaned the pattern the materal of adjectve to the students. Then the teacher asked to the students to wrte some words that they known on ther paper. In the end of learnng, the teacher gave homework to the students based on the materal. 43

18 The result of the research shows that the expermental class (the students who are taught usng song) has the mean value (85.64) meanwhle the control class (the students who are not taught usng song) has the mean value (8.7). It can be sad that the achevement score of expermental class s hgher than control class. The data were obtaned from the students achevement score of the tests. They were pre test and post test scores from the expermental and the control class. The average score of pre test for expermental class was And the average score of pre test for control class was The followng was the smple table of pre and post test students average score. Table 4.6 The pre test and post test students average score of the expermental and control class. Class The Average of Pre test The Average of Post test Experment Control Based on the result of pre-test and post-test, t could be concluded that usng song was effectve to teach vocabulary of Adjectve at the eght graders of SMP N Gubug n academc year of 0/03. It can be seen from the result of analyss by usng t- test formula:. The achevement of experment group before treatment s rather same wth control group before treatment. It can be seen from the mean of pre test of expermental group (63.39) and control group (60.4) before the treatment. There s no sgnfcant dfference n students achevement between experment and control group.. The achevement of expermental group after treatment s better than experment group before treatment. It can be seen from the mean of post- 44

19 test of expermental group (85.64). It s hgher than experment group (63.39) before the treatment. 3. The achevement of control group before treatment s lower than control group after treatment. It can be seen from the mean of pre-test of control group (60.4). It s lower than the mean of post-test of control class (8.7) after the treatment. 4. The achevement of expermental group after treatment better than control group after treatment. It can be seen from the mean of post test of the expermental group (85.64). It s hgher than the mean of post test of control group (8.7) after the treatment. 5. The case n both groups s the same that there s an mprovement n each group s cogntve achevement. However, the mprovement on control group s not as much as on the expermental group. It s convnced by the statstcal result of the hypothess test. The test by means of t-test formula shown that t count =.09 > t table =.67 at 0.05 level of sgnfcance by 56 degrees of freedom. It means that the usng of song s more effectve to mprove the students understandng on vocabulary of Adjectve than usng conventonal method (explanaton only). So, t could be concluded that usng song s effectve to facltate students understandng on vocabulary of Adjectve n expermental group. It can be seen at mean of both groups. There s sgnfcant dfference n the students vocabulary achevement between experment and control group. C. Lmtaton of the Research. The researcher realzes that ths research has not been done optmally. There were obstacles faced durng the research process. Some lmtatons of ths research are:. Relatve short tme of research makes ths research could not be done maxmum. 45

20 . The research s lmted at SMP N Gubug. So that, when the same research wll be gone n other schools. It s stll possble to get dfferent score. Consderng all those lmtatons, there s a need to do more research about teachng vocabulary of Adjectve usng song, so that the more optmal result wll be ganed. 46