What Is Time-series A Quantitative Forecasting Method to Predict Future values Numerical Data Obtained at regular Time Intervals Projections Based on Past and Present Observations Example: Year:19941995199619971998 aes 75.374.278.579780.2What Is Time-Series • A Quantitative Forecasting Method to Predict Future Values • Numerical Data Obtained at Regular Time Intervals • Projections Based on Past and Present Observations • Example: Year:1994 1995 1996 1997 1998 Sales: 75.3 74.2 78.5 79.7 80.2