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Could be multiple correct answers QUESTION 15 Which of the following statement(s) about degrees of freedom is/are correct: df = 4 in calculating between-group variation,

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QUESTION 15 Which of the following statement(s) about degrees of freedom is/are correct: df = 4 in calculating between-group variation, when testing "whether five global manufacturing plants of Apple share the same monthly output" O df = 100 in testing Ho: M = 100 against Ha: W # 100 with a sample size of 100 and unknown population variance. df = 4 in testing whether SAT scores follows N(66, 100-), i.e., a normal distribution with mean 660 and standard deviation 100; suppose the sample is grouped into 5 categories and large enough sample size. df = 10 in the distribution of Z, + Zz + ... + Z10 where Z1. ... Z10 are independent standard normal random variables, O df = 34 in testing Ho: H1 - H2 2 25 against Ha: H1 -H2

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