645Χ2= - 1.290, 322Χ2= - 644, 420Χ3= - 1.260, 741Χ2= - 1.482, 620Χ3= - 1.860, 732Χ4= - 2.928, 602Χ4= - 2.408, 432Χ3= - 1.296,

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