Final answer:
The question is about forecasting food and beverage sales and analyzing related data to develop a forecasting model and make predictions for the fourth year.
Step-by-step explanation:
The question is asking for assistance with a case problem from Chapter 8 of the Data Analytics book by Camm et al. Specifically, the problem involves forecasting food and beverage sales. To address the question, we need to:
a) Develop a time series plot and comment on the underlying pattern of the data to determine the most appropriate forecasting model.
b) Develop a forecasting model for the data and justify the choice of model through an analysis of R-square, F-test, residual plots, and the significance of coefficients.
c) Forecast sales for the fourth year from January through December.
d) Calculate the forecast error if the actual sales value for January in the fourth year is given and provide clarification to resolve any uncertainty about the forecasting procedure.