data science course singapore data science course singapore | Page 36

Observations
•  Every alternate sample is large, many of them
staHsHcally significant also
•  ACFs at lags 4, 8, 12, etc are posiHve
•  ACF at lags 2,6,10 etc are negaHve
•  All these pick up the seasonal aspect of the data
•  The data may be re-examined afer ‘removing’
seasonality
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