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A dietitian is looking into the average weight of middle school & High school students in Bahrain. The population mean was KG 51.81 with a

A dietitian is looking into the average weight of middle school & High school students in Bahrain. The population mean was KG 51.81 with a standard deviation on 15.33. Assuming it is normally distributed. She drew a sample of 31 students whose average weight was KG 46.64. Calculate the Test Statistic? (write your answer in 2 decimal numbers)

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