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Note that in this question you only have to calculate the test statistic. Suppose there are twenty five students in a class and they did

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Note that in this question you only have to calculate the test statistic. Suppose there are twenty five students in a class and they did a test where the average mark was 88.5 with standard deviation 3.8. Calculate the test statistic if you are testing the claim the average mark is different to 60 using level of significance is 5%

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