Out of 300 customers of Bank A interviewed, 38 were not satisfied with the services while 20 out of 200 customers of Bank B complained of the services.use chi s
Mathématiques
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Question
Out of 300 customers of Bank A interviewed, 38 were not satisfied with the services while 20 out of 200 customers of Bank B complained of the services.use chi square distribution to test at 1% level whether or not the number of complaints Is independent of the efficiency of the bank.