1. The amount of water discharged by the Davao River has changed over time in roughly a straight-line pattern. A regression line for predicting water discharged (in cubic kilometers) during a given year is predicted discharge = -7792 + (4.226 x year) How much (on average) does the volume of water increase with each passing year? 2. The number of faculty and the number of students are shown for a random selection of small colleges in Davao City. Is there a significant relationship between the two variables? Switch x and y and repeat the process. Which do you think is really the independent variable? Faculty 99 110 113 116 138 174 220 Students 1353 1290 1091 1213 1384 1283 2075
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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