Confidence the difference in the level of satisfaction

Reference no: EM1320775

A bank is comparing the quality of service given by its two most important branches. In branch A, 192 out of a random selection of 300 of its customers said that they were satisfied with the service. In branch B, 138 out of 250 randomly selected customers said that they were satisfied with the service.

Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.

Reference no: EM1320775

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