Using MAD as a criterion, which technique yields the better forecast? Select A or B? What is the calculated MAD value of the technique that is more accurate? Forecast Actual Month Techníque A Technique B Demand 490 490 488 2 491 491 484 3 469 469 480 4 454 454 490 500 500 497 492 492 493
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.
The data are given,
The absolute deviation can be calculated as,
Number of observations = n = 6
Absolute deviation = |Actual demand - Forecast technique|
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