The actual demand for a product and the forecast for the product are shown below. Calculate MAD and MSE. Show all of your computations. 
Definitions:
Deductive Argument
A form of reasoning where, if the premises are true, the conclusion must also be true, proceeding from general principles to a specific case.
Causal Arguments
Reasoning that seeks to establish a cause-and-effect relationship between two or more phenomena.
Correlation
A measure or degree of relationship between two variables where changes in one variable correspond to changes in the other, though not necessarily implying causation.
Self-Selected Sample
A sample where only the people most interested in the poll or survey participate.
Q11: Eight observations were selected from each
Q12: Refer to Exhibit 18-6. To test the
Q18: The process of allocating the total sum
Q21: Consider the following data. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2162/.jpg" alt="Consider
Q39: Refer to Exhibit 16-2. The degrees of
Q44: The process mean and standard deviation can
Q45: Ten drivers were asked to drive
Q50: For the Wilcoxon signed-rank test, differences of
Q61: Refer to Exhibit 18-6. The mean and
Q80: The forecasting model that makes use of