The following data present the yields in quintals of common ten subdivisions of equal area of two agricultural plots : Plot 1: 6-2 5-7 6.5 6.0 6-3 5-8 5-7 6.0 6-0 5-8 Plot 2: 5-6 5.9 5-6 5-7 5.8 5-7 6-0 5.5 5.7 5-5 Test whether two samples taken from random populations have the same variance. (5% point of F for vy = 9 and v2 = 9 is 3.18).

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