please do the all parts or do only a first 4. (a) A sample of 12 of bags of Calbie Chips were weighed (to the nearest gram), and listedhere as follows.219, 226, 217, 224, 223, 216, 221, 228, 215, 229, 225, 2293Find a 95% confidence interval for the mean mass of bags of Calbie Chips.(b) Professor GeniusAtCalculus has two lecture sections (A and B) of the same 4th yearAdvanced Calculus (AMA 4301) course in Semester 2. She wants to investigate whethersection A students maybe "smarter" than section B students by comparing their perfor-mances in the midterm test. A random sample of 12 students were taken from sectionA, with mean midterm test score of 78.8 and standard deviation 8.5; and a randomsample of 9 students were taken from section B, with mean midterm test score of 86and standard deviation 9.3. Assume the population standard deviations of midterm testscores for both sections are the same. Construct the 90% confidence interval for thedifference in midterm test scores of the two sections. Based on the sample midterm testscores from the two sections, can Professor GeniusAtCalculus conclude that there is anyevidence that one section of students are "smarter" than the other section? Justify yourconclusions.

Name: please do the all parts or do only a first 4. (a) A sample of 12 of ba
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Description: please do the all parts or do only a first 4. (a) A sample of 12 of bags of Calbie Chips were weighed (to the nearest gram), and listedhere as follows.219, 226, 217, 224, 223, 216, 221, 228, 215, 229, 225, 2293Find a 95% confidence interval for the m