a) A drive through candy shop kept a record of the number of cans of drink it sells over a 3-week period

Required: a) Compute a 4-point moving average and Centre them (4 marks) b) Draw a time series graph and super impose the trend line over it (4 marks) c) Comment on the trend direction and speed (4 marks) b) Assuming an additive model, completely decompose the time series (8 marks)

a) A drive through candy shop kept a record of the number of cans of drink it sells over a 3-week period: Week 1 Week 2 Week 3 Mon Tues Wed Thurs Fri Mon Tues Wed Thurs Fri Mon Tues Wed Thurs Fri 1822 9 7 15 1923 9 8 16 21 23 10 10 16 Required: (4 a) Compute a 4-point moving average and Centre them marks) b) Draw a time series graph and super impose the trend line over it marks) (4 (4 marks) c) Comment on the trend direction and speed b) Assuming an additive model, completely decompose the time series marks) (8 a) A drive through candy shop kept a record of the number of cans of drink it sells over a 3-week period: Week 1 Week 2 Week 3 Mon Tues Wed Thurs Fri Mon Tues Wed Thurs Fri Mon Tues Wed Thurs Fri 1822 9 7 15 1923 9 8 16 21 23 10 10 16 Required: (4 a) Compute a 4-point moving average and Centre them marks) b) Draw a time series graph and super impose the trend line over it marks) (4 (4 marks) c) Comment on the trend direction and speed b) Assuming an additive model, completely decompose the time series marks) (8