Question: 8.139 (comment: this problem requires data manipulation skills to compute the needed variables, as outlined in the problem). In addition: please report the appropriate 95%

8.139 (comment: this problem requires data manipulation skills to compute the needed variables, as outlined in the problem). In addition: please report the appropriate 95% confidence interval for the mean difference. To summarize the data manipulation (Hint, use commands covered in the slides on Data Wrangling): 1) calculate the average HgbA1c value for each subject across all visits

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