Q2 The two "experienced" operation managers have resisted the introduction of a computerized linear regression forecasting system, claiming that their current forecasting tool is "much better than any impersonal computer could do". Table Q2 shows the weekly demand for the previous period. Perform the following: () Develop a linear regression model using the actual demand, and make four(4)-week forecast of production; (i) Determine the mean square error and standard error of the forecast developed in section (i) Table Q2 Actua Week Demand 1 3,000 2 4,400 3 4,200 4 3,100
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
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