Evaluation of Some Body Dimensions with Cronbach Alpha Coefficient in Saanen Kids

Abstract

Cronbach's alpha coefficient (α), which was developed by Cronbach (1951), is an internal consistency estimation method, and still remains the most widely used measure of scale reliability. Although reliability analysis is mostly used in the social sciences, in this study it is applied to some body measurements for 82 head of Saanen kids at third months of age. The independent variables were determined as X=(x1, x2, x3, x4); the withers height (x1=WH), body length (x2=BL), chest depth (x3=CD), rump height (x4=RH). As the dependent variable, sixth month live weight (Y=LW) was taken. Thus, by calculating, it is aimed to investigate whether the explanatory variables constitutes to explain a homogeneous structure in whole. The total for 4 independent variables is calculated as 0,900. On the other hand, since the coefficient of CD variable was calculated as 0.908. This variable was excluded from the analysis because of decreasing the reliability. As a result of the reliability analysis, decreasing the number of variables decreased the R2 value and increased the Mean Square Error (MSE). According to this; The R2 value for the 4 variables is 75.80% and for the 3 variables 69.50% which is lover. In this study, it was determined that the reliability of the variable had no effect on the model. This may be due to the nature of the data. As a result, 3 independent variables were found to confirm that they form a whole explanation for a homogeneous structure.