The Technique of Sample Taking The Instrument of Research

6. The Technique of Data Analysis

After collecting the data the writer analyzed the data by using statistical calculation. In analyzing the data, the writer used the comparative technique. In the comparative technique, the variables are compared to know whether differences are significant. The writer uses t- test to find out the differences score of students’ achievement in teaching action verbs without cooperative learning which adapted from Anas Sudijono. The writer analyzed the result of final test using statistical calculation of t- test as follow. The Formula is as follows: t observation Mean of variable X Mean of variable Y Standard error mean of difference mean of variable X and mean of variable Y The procedure of calculation as follow: a. Determining Mean of variable X, with formula: =the average of gained score mean of variable X =sum of gained score variable X N= number of the students b. Determining Mean of variable Y, with formula: =the average of gained score mean of variable Y =sum of gained score variable Y N= number of the students c. Determining of Standard of Deviation score of Variable X, with formula: √ Standard Deviation score of Variable X Sum of squared gained score Variable X Number of the students d. Determining Standard Deviation Score of Variable Y, with formula: √ Standard Deviation score of Variable Y Sum of squared gained score Variable Y Number of the students e. Determining Standard Error Mean of Variable X, with formula: √ Standard Error Mean of Variable X =Standard Deviation of Variable X Number of the students f. Determining Standard Error Mean of Variable Y, with formula: √ Standard Error Mean of Variable Y =Standard Deviation of Variable Y Number of the students g. Determining Standard Error Mean of Difference Mean of variable X and Mean of Variable Y, with formula: √ + Standard error of difference mean of variable X and mean of variable Y Sum of squared standard error mean of variable X Sum of squared standard error mean of variable Y h. Determining t- table in significant level 5 and 1 with df. Degree of freedom Number of student experiment class Number of students controlled class 3 3 Anas Sudjono, PengantarStatistikPendidikan, Jakarta: PT Raja GrafindoPersada, 2008, p. 315.