Fit a regression line to the data shown in the chart, and find the coefficient of correlation for the line. Use the regression line to predict life expectancy in the year 2020, where x is the number of decades after 1900. 2 (1920) life expectancy, y 48.3 years 50.6 years 52.2 years 53.4 years 54.4 years 0 (1900) 4 (1940) 6 (1960) year, x 8 (1980) Choose the regression line. A. y = 0.750x + 48,78 O B. y = 0.750x - 48.78 OC. y = 48.78x + 0.750 O D. y = 48.78 The coefficient of correlation rounded to three decimal places is
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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