Dwi Undayasari, 2013 The Use of Role-
Play i O e of Vocatio al Schools i Su eda g to I prove Stude ts’ Speaking Skill
Universitas Pendidikan Indonesia | repository.upi.edu | perpustakaan.upi.edu virtually imposible.
FL U
EN C
Y 5
Speech as fluent and effortless as that of a native speaker. 4
Speed of speech seems to be slightly affected by language problems.
3 Speed and fluency are rather strongly affected by language
problems.
2 Usually hesitant; often forced into silence by language
limitations.
1 Speech is so halting and fragmentary as to make conversation
virtually imposible.
C O
MPR EH
EN SION
5 Appears to understand everything without difficulty.
4 Understans nearly everything at normal speed, although
occasional repetition may be necessary.
3 Understands most of what is said at slower-that-normal speed
with repetations.
2 Has great difficulty following what is said. Can comprehend
onnly “social conversation” spoken slowly and with frequent repetations.
1 Cannot be said to understand even simple conversational
English.
3.5. Data Analysis
3.5.1. The Speaking Test Data Analysis
3.5.1.1. The Normality Distribution Test
Dwi Undayasari, 2013 The Use of Role-
Play i O e of Vocatio al Schools i Su eda g to I prove Stude ts’ Speaking Skill
Universitas Pendidikan Indonesia | repository.upi.edu | perpustakaan.upi.edu
According to Coolidge 2000, t-test and its critical values are based on the upon the assumption that the sample dependent variable
values come from a population of values that is normally distributed. The normality distribution test can be calculated with SPSS 16.0 for
windows by using Kolmogorov-Smornov Test. The hypotheses of this study are:
H : The data of the experimental and control groups is normally
distributed. H
1
: The data of the experimental and control groups is not normally distributed.
The criteria of normality distribution test by using 5 level of significance p= 0,05, two tailed test are:
If the significance value Sig. 0.05, H is rejected
If the significance value Sig. 0.05, H is not rejected
The level of significant criterion for normality distribution stated that if Asymp. Sig. is lower than 0.05, it means that the data of
the experimental and control groups is normally distributed, while if Asymp. Sig. is higher than 0.05, it means that the data of the
experimental and control groups is not normally distributed.
Dwi Undayasari, 2013 The Use of Role-
Play i O e of Vocatio al Schools i Su eda g to I prove Stude ts’ Speaking Skill
Universitas Pendidikan Indonesia | repository.upi.edu | perpustakaan.upi.edu
3.5.1.2. Variance Homogeneity Test
The assumption is that the variances of the two groups about their respective means will be equal or approximately equal no matter
wh ether the two groups’ means are different or not Coolidge, 2000.
Variance homogeneity test can be calculated with SPSS 16.0 for windows by using
Levene’s Test. The hypotheses used are as follow:
H : The variance of the experimental and control groups are
homogenous H
1
: The variance of the experimental and control groups are nor homogenous
The criteria of variance homogeneity test by using 5 level of significance p= 0,05, two tailed test are:
If the significance value Sig. 0.05, H is rejected
If the significance value Sig. 0.05, H is not rejected
The level of significant criterion for variance homogeneity stated that if Asymp. Sig. is lower than 0.05, it means that the variance
of the experimental and control groups are homogenous, while if
Dwi Undayasari, 2013 The Use of Role-
Play i O e of Vocatio al Schools i Su eda g to I prove Stude ts’ Speaking Skill
Universitas Pendidikan Indonesia | repository.upi.edu | perpustakaan.upi.edu
Asymp. Sig. is higher than 0.05, it means that the variance of the experimental and control groups is not homogenous.
3.5.1.3. t-test Computation
