Create a scatter plot of the mape pairs with training mape

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Reference no: EM131588860

Numerical Assignment

Your assignment is to address the questions on pages 216-218. Use whatever software resources make the most sense (Tableau, Excel, R, etc.) given that you are working with more than 500 time series. (Remember that for the regression model in 8(d) you are only to forecast the first 5 series). Your response to the case will be answers to the text questions (upload Excel or Tableau files, along with a Word file or .pdf with responses to the written questions).

PAGES 216-218

Background: Tourism is one of the most rapidly growing global industries and tourism forecasting is becoming an increasingly important activity in planning and managing the industry.

Problem Description: The 2010 tourism forecasting competition had two parts. in part I, competitors were tasked with producing forecasts for the next four years, given 518 series of annual tourism data.

Available Data: The data consists of 518 annual series, each related to some (undisclosed) tourism activity. Tourism activities include inbound tourism numbers to one country tourism expenditure, etc. The series differ in lenght, ranging from 7 year series to 43 year series. they also differ in the order of magnitude of values. The data is available at www.kaggle.com/c/tourism/data

Assignment Goals: This case will give you experience with forecasting a large number of series. while the competition goal was a achieve the highest predictive accuracy, the goal of this case is to highlight different aspects of the forecasting process that pertain to forecasting a large number of series. for example easy to use visualization tools have a significant advantage for visualizing a large number of series.

Note that multiple series in this case are not likely to be forecasted together. however, it is common to forecast the demand for a large number of series such as products in a supermarket chain. Another aspect of this case is the use of different predictive measures, and handling practical issues such as zero counts and summarizing forecast accuracy across series.

The assignment provides guidelines for walking you through the forecasting process. remember that the purpose is not winning the (already completed) contest, but rather learning how to approach forecasting of a large number of series.

1. Plot all the series (an advanced data visualization tool is recommended)-what type of components are visible? are the series similar or different? check for problems such as missing values and possible errors.

2. Partition the series into training and validation so that the last 4 years are in the validation period for each series. what is the logic of such partitioning? what is the disadvantage?

3. generate naive forecasts for all series for the validation period. for each series create forecasts with horizons of 1,2,3, and 4 years ahead.

4. which measures are suitable if we plan to combine the results for the 518 series? consider MAE, average error, MAPE, and RMSE.

5. For each series, compute MAPE of the naive forecasts once for the training period and once for the validation period.

6. The performance measure used in the competition is mean absolute scaled error (MASE). explain the advantage of MASE and compute the training and validation MASE for the naive forecasts.

7. Create a scatter plot of the MAPE pairs with training MAPE on the x-axis and the validation MAPE on the y-axis. Create a similar scatter plot for the MASE pairs. now examine both plots. what do we learn? how does performance differ between the training and validation periods? how does performance range across series?

Attachment:- Tourism.rar

Reference no: EM131588860

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