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Please find below TSF Extended Project instructions: 1

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Please find below TSF Extended Project instructions: 1. You have to submit 2 files: a. Answer Report: In this, you need to submit all the answers to all the questions in a sequential manner. It should include the detailed explanation of the approach used, insights, inferences, all outputs of codes like graphs, tables etc. Your report should not be filled with codes. You will be evaluated based on the business report. Note: In the business report, there should be a proper interpretation of all the tasks performed along with actionable insights. Only the presence of interpretation of the models is not sufficient to be eligible for full marks in each of the criteria mentioned in the rubric. Marks will be deducted wherever inferences are not clearly mentioned. b. Jupyter Notebook file: This is a must and will be used for reference while evaluating. 2. Any assignment found copied/ plagiarized with another person will not be graded and marked as zero. 3. Please ensure timely submission as a post-deadline assignment will not be accepted. Project Details: 1. Problem 1: data set is – Shoesales.csv (attached) - You are an analyst in the IJK shoe company and you are expected to forecast the sales of the pairs of shoes for the upcoming 12 months from where the data ends. The data for the pair of shoe sales have been given to you from January 1980 to July 1995. 2. Problem 2: data set is – SoftDrink.csv (attached) - You are an analyst in the RST soft drink company and you are expected to forecast the sales of the production of the soft drink for the upcoming 12 months from where the data ends. The data for the production of soft drink has been given to you from January 1980 to July 1995. Please do perform the following questions on each of these two data sets separately – Read the data as an appropriate Time Series data and plot the data. – 2 marks. Perform appropriate Exploratory Data Analysis to understand the data and also perform decomposition. – 6 marks. Split the data into training and test. The test data should start in 1991. – 2 marks. Build various exponential smoothing models on the training data and evaluate the model using RMSE on the test data. Other models such as regression, naïve forecast models, simple average models etc. should also be built on the training data and check the performance on the test data using RMSE. – 18 marks. Check for the stationarity of the data on which the model is being built on using appropriate statistical tests and also mention the hypothesis for the statistical test. If the data is found to be non-stationary, take appropriate steps to make it stationary. Check the new data for stationarity and comment. – 3 marks. Note: Stationarity should be checked at alpha = 0.05. Build an automated version of the ARIMA/SARIMA model in which the parameters are selected using the lowest Akaike Information Criteria (AIC) on the training data and evaluate this model on the test data using RMSE. – 10 marks. Build ARIMA/SARIMA models based on the cut-off points of ACF and PACF on the training data and evaluate this model on the test data using RMSE. – 9 marks. Build a table with all the models built along with their corresponding parameters and the respective RMSE values on the test data. – 2 marks. Based on the model-building exercise, build the most optimum model(s) on the complete data and predict 12 months into the future with appropriate confidence intervals/bands. – 3 marks. Comment on the model thus built and report your findings and suggest the measures that the company should be taking for future sales. – 5 marks.