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A sample of 15, 10 years old children was taken to study whether watching television reduces the amount of physical exercise, causing weight gains. The number of kilograms each child was overweight by was recorded (a negative number indicates the child is underweight). In addition, the number of hours of television viewing per week was also recorded. These data are listed in the table below.
Television(hours)  42  34  25  35  37  38  31  33  19  29  38  28  29  36  18 
Overweight (Kg)  8  3  0  0  6  6  3  3  4  4  4  2  1  6  3 
(KG). Briefly explain the selection of each variable on the X and Y axes and why? (3 marks)
Television(hours) and Overweight (KG). (2 marks)
linear regression model? (2 marks)
Note: (Answer for question (b) to (f) should be supported with the excel output. Hence, you are required to provide the excel output as the supplementary file(s) in Appendix Section.
Marking criteria
Marking criteria  Weighting 
Question 4

15 marks 3 marks
2 marks 

3 marks 2 marks 