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Moving Average

4 (a) Refer to the table in Appendix 1. Calculate:
(i) the centred quarterly moving average for quarter 3, 2018 (3 marks)
Summer 2019 Paper 32

4 period MA = 8 period moving total/8 (1 mark if no calculation)
= (23 + 36 + 50 + 36 + 36 + 50 + 36 + 25)/8

= 36 500 litres or 36.5 thousand litres