Measurement and modeling Mechanical - moving averages Moving averages We have to define the lenght of a moving average. Let's take it as 3. We take first 3 observations and calculate the average. The result is assigned to the time unit which is in the middle. Than we move forward, leave out the ...
THE ANALYSIS OF MONTHLY DATA Data presentation Y - number of passangers of airline company (in thousands). Data has been taken from Box G.E.P., Jenkins G., “time series: analysis, forecasting and control”. graphs - 2D graphs - line plots (variables) Number of passangers is growing (we have tren...
THE ANALYSIS OF QUARTERLY DATA Data presentation Y - sales of a medicine cennected with a flu Graphs - 2D plots - line plots (Variables) Trend identification The nature of Y variable - since this medicine is good for flu, most probably sales are higher in winter time if this medicine is good w...
TREND ANALYSIS BASED ON YEARLY DATA (5.03) Data Trend identification The analysis of the problem done even without any data Graph ( graphs - 2d graphs - line plots (variables) ) Do we have a trend? Yes, the consumption is growing Testing trend coeficients Measurement and modeling Mechanical...
THE ANALYSIS OF MONTHLY DATA Data presentation Y - number of passangers of airline company (in thousands). Data has been taken from Box G.E.P., Jenkins G., “time series: analysis, forecasting and control”. graphs - 2D graphs - line plots (variables) Number of passangers is growing (we have tren...
