A) A time series can consist of multipal components. Describe the components and how they can be made into an additive, and a multiplicative model. State any differences and similarities between the models. B) The table below shows quarterly observations of the electrical usage (in MWh) for a society from the first quarter of 2016 till the fourth quarter of 2019. Choose a suitable model and even up the serie with the help of moving averages. 2,9 1,2 0,8 2,4 4,1 1,7 1,2 4,0 6,6 2,7 1,8 5,1 10,7 3,9 2,7 7,5
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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