W Muue The school of Industrial Engineering and Management would like to add a module into the curriculum to help students increase their scores. Scores of 10 random students collected before and after the module is applied are shown below: Student Pre – module score Post-module score 77 80 70 73 75 a. At 5% level of significance, should the school still add the module in the curriculum? b. Construct the 99% confidence interval for pl – 112 = ud from these data.

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