Question 6 (4 + 2 = 6 marks) The jTeIe mobile phone company is looking at the tweet count containing their hash- tag. in the three days alter the release of a new model. The counts are aggregated into four time periods; midnightto 6am. The data are below. Period 1 Day 1 29 Day 2 55 Day 3 57 6am to noon. noon to 6pm and 6pm to midnight. Period 2 Period 3 Period 4 35 63 47 69 66 71 78- 92 B2 The company decides to estimate the trend in the data. alter a square root transfor- mation, and allowing for a periodic (seasonal) effect. The tables below shows the estimated moving average trend. and periodic components. Trend Period 1 Period 2 Period 3 Period 4 Day 1 6.73 t Day 2 7.35 7.37 3.03 3.17 Day 3 8.42 8.68 Periodic Period 1 Period 2 Period 3 Period 4 Periodic 43.610 0.235 {1.541 I: Page 8 of 11 300958 Social Web Analytics Final Examination (a) Compute the missing trend component marked with a t