is the sinusoid pattern a constant why does correlogram contain sometimes a sinusoid pattern? why do you have a sinusoid pattern why is the sinusoid pattern in correlogram a constant why do you notice sinusoids why do correlograms have sinusoids do random figures have a sinusoid pattern in a correlogram? why does arc have sinusoid patterns? why do we see a sinusoid pattern why do you see a sinusoid pattern why do correlograms have sinusoid patterns why a correlogram has the sinusoidal pattern of why a sinusoid pattern is found why do you find a sinusoid pattern in an acf why is there a sinusoid pattern in a correlogram why do correlograms contain sinusoids why does the ACF of an AR(1) contains sometimes a sinusoid-like pattern? and what does it mean? why does the acf of an ar(1) contain sometimes a sinusoid-like pattern? and what does it mean? why would we see a sinusoid pattern on a correlogram why does the acf in a correlogram contain a sinusoid pattern?