Answer to Question #29931 in Finance for Lalmuanpuia Ralte

Question #29931
Two research worker classified some people in income groups on the basis of sampling studies. Their results are as follows:
Investigators Income groups Total
A 160 30 10 200
B 140 120 40 300
Total 300 150 50 500
Show that the sampling technique of at least one research worker is defective.
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