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QUESTION 6 It was found that the mean annual turnover rate of the Aspirin medicine bottle is 15. The management think that the mean is

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QUESTION 6 It was found that the mean annual turnover rate of the Aspirin medicine bottle is 15. The management think that the mean is changed. Therefore, a random sample of 43 is chosen that shows the average is 22 and the standard deviation is 12. Use 0.02 significance level to test this claim. Based on the above, the test statistic is equal to? (Round answer to two decimal places ex. 2.09)

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