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A random sample of 200 physicians shows that there are 36 of them who make at least $400,000 a year. What is the test statistic

A random sample of 200 physicians shows that there are 36 of them who make at least $400,000 a year. What is the test statistic if we want to test that the true proportion of physicians in the population who make at least $400,000 a year is less than 0.24?

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