An observation that has a strong influence or effect on the regression results.

A graphical presentation of the relationship between time and the time series variables.

Encompasses the set of analytical techniques that describes what happened in the past.

A cyclical pattern exists if the time series plot shows an alternating sequence of points below and above the trend line lasting more than one year.

The difference between the actual time series value and the forecast.

The calculated value from adding all the squared residual terms.

A forecasting method that uses the average of the most recent k data values in the time-series as the forecast for the next period.

A graphical tool used to help determine whether a process is in control.

Which of the following is considered a secondary erogenous zone?

These thin, curled, and threadlike structures are densely-packed in the testicles and are the major source male sex hormones.