Because we are taking the average of two years.....(The 4 yearly moving averages need to be centred,so a two yearly moving average is constructed in order to centre them to corresponding year. These 4- yearly moving averages are then called as the 4- yearly moving averages)
Khub sundor bujha6i kivbe average ta likbo
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Osm
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NICE BIDEO
Mam y mam we divide by 2
Because we are taking the average of two years.....(The 4 yearly moving averages need to be centred,so a two yearly moving average is constructed in order to centre them to corresponding year. These 4- yearly moving averages are then called as the 4- yearly moving averages)
@@saralstatistics3980 maam then what will we do with 3 yearly moving average?
No need to be centred....just put the 3 yearly moving average against the middle year