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Your professor is interested in learning if retaking an exam after attending office hours and studying influences grades. He decides to compare 16 student's 1st

Your professor is interested in learning if retaking an exam after attending office hours and studying influences grades. He decides to compare 16 student's 1st exam scores versus their retake scores. There was a sample mean difference of +6 and a standard deviation of 4. State the null and alternative hypothesis. Did attending office hours lead to any change in exam scores? Show all of your work and write a conclusion

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