1. The file "SAMPLEGRADESINTROSTATS" gives grades on assignment 5 (the last course assignment for the course) for 14 randomly chosen students from an introductory Statistics class taught by your instructor. Use R commander to assess the shape of the sample data. Does the sample data provide evidence to suggest the population is not normally distributed? Are there any apparent outliers? (5 marks)
2. The file "GRADESINTROSTATS" gives introductory statistics grades for all 31 students in the class mentioned above. It includes assignment, lab quiz, final lab exam, lecture midterm and lecture final grades. Use R commander to assess the shape of the assignment 5 sample data. Does the sample data provide evidence to suggest the student gradeson assignment 5 are not normally distributed? Are there any apparent outliers? (5 marks)
3. Do your answers to part a) and part b) seem to agree? Why or why not? (3 marks)
4. The data found in the file "ELECTRICITYCHARGESONEBEDAPARTMENT" gives monthly electricity costs for 12 one-bedroom apartments in a certain building in your city. Use R commander to assess the shape of the sample data. Is there evidence that monthly costs are not normally distributed? Are there any apparent outliers? (5 marks)