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A research firm reported that 15% of those surveyed stated their health as poor, 26% as good, 40% as very good, and 19% as excellent. A health professional in Chicago wanted to determine if people in Chicago had similar feelings toward their health. In a sample of 610 people, 70 described their health as poor, 180 as good, 220 as very good, and 140 as excellent. Plot observed and expected values and calculate the test value.

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