Question 35 (1 point) Which of the following statements regarding time series is FALSE? The easiest way to determine cyclical variation is the residual method, where actual and predicted trend values are compared for each year. Irregular variation refers to fluctuations over time in a variable that are completely unpredictable or sporadic. Seasonal variation represents variation around the secular trend. The most common technique for determining a secular trend in a time series is to fit a line to the data using either the graphic or least squares technique