Stan's, a department store chain, has conducted a survey to collect data on customer satisfaction and perception of its merchandise and service. Data for responses to the question "How likely is it that you would recommend Stan's to a friend or colleague?" appear below.

RequiredWhat is Stan's net promoter score?

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SCORE NUMBER OF RESPONSES 641 10 1,265 8. 1,254 228 548 493 357 3. 63 2 42 109 Total 5,000