Example No.4

 

Enter data:  

Control : 0.337, 0.302, 0.405, 0.400, 0.381, 0.398, 0.377, 0.392, 0.345, 0.409 mmol.l-1

Test : 0.341, 0.302, 0.504, 0.452, 0.309, 0.375, 0.479, 0.423, 0.311, 0.333 mmol.l-1

 

1) Calculation of mean values:   

Results:  Control: 0.375 mmol.l-1

                Test: 0.3mmol.l-1

 

2) Calculation of standard deviations (SD):

Results: Control: 0.0353 mmol.l-1

               Test: 0.0758 mmol.l-1

 

3) Calculation of F-test:

 

DF: n1-1=9, n2-1=9

As calculated F > Fcrit = 4.030 (DF 9,9, α=0.05) difference between variances is statistically significant.

 

 

4) Calculation of unpaired t-test for unequal variances (n1=n2):

 

As calculated t < tcrit= 2.262 (DF=9, α=0.05) difference between means is statistically insignificant. 

 

Conclusion: As the difference between means of control and test group is statistically insignificant (p>0.05), preparation doesnīt influence AST  level in blood serum of dairycows.

 

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