Fifteen fourth-grade students were randomly assigned to three groups to experiment with  three different methods of teaching arithmetic. At the end of the semester, the same test was  given to all 15 students. The table gives the scores of students in the three groups.  Method I  Method II  Method III   48 55 84   73   85   68   51  70   95   65   69   74   87 90 67  CALCULATE the value of the test statistic F

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Fifteen fourth-grade students were randomly assigned to three groups to experiment with 
three different methods of teaching arithmetic. At the end of the semester, the same test was 
given to all 15 students. The table gives the scores of students in the three groups. 
Method I 
Method II 
Method III 
 48 55 84 
 73 
 85 
 68 
 51
 70 
 95 
 65 
 69 
 74 
 87 90 67 
CALCULATE the value of the test statistic F

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