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4. Test the null hypothesis of independence of the two classifications A and B of the 4x2 contingency table shown here. Use a = 0.10.

4. Test the null hypothesis of independence of the two classifications A and B of the 4x2 contingency table shown here. Use a = 0.10. (10) B B1 B2 A1 43 139 A Az 47 138 A3 39 150 A4 50 142

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