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user 22047
The AutoCorrelation Function and Partial AutoCorrelation Function pertain to the correlation of a time series with itself at different lags. They are used to detect non-independence & suggest p, d, q terms in the Box-Jenkins approach to ARIMA modeling.
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What does it mean to have only lag significance on certain multiples of 7
We can be confident that this is a day of the week effect.
In many places, and perhaps most, what is reported or done or happens as far as Covid is concerned varies with day of the week. This seems to …
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