DEC 2019

QUESTION 7 a) Define and give ONE (1) example of the following components in time series. i) Trend. (2 marks) ii) Seasonal variation. (2 marks) b) The following table shows the number of customers registered for RGH swimming classes from the year 2016 to 2018. Year Quarter 1 2 3 4 2016 60 50 40 80 2017 70 40 30 70 2018 80 40 40 90 i) Find the trend values for the number of customers registered for RGH swimming classes using the moving average method (correct to two decimal places). (5 marks) ii) Determine the seasonal index for each quarter. (6 marks) iii) Interpret the seasonal indices obtained for the third and fourth quarter. (2 marks) iv) Forecast the number of customers registered in the third quarter of 2019