Estimation The scatter plot shows the daily high temperatures in a city over the past 180 days. The plot suggests a linear association among the data. Two points that lie on the trend line drawn for the data are (49,62) and (161,29). Estimate an equation for the trend line drawn by first rounding each of the coordinates to the nearest 10. Estimate an equation for the trend line drawn. Choose the correct answer below. O A. y= -0.18x + 69.0 O B. y= -0.27x+ 73.5 OC. y= -0.27x + 72.3 O D. y = -0.18x + 58.8 Daily High Temperatures 90- 75- 60- 45- 30- 15- of 30 60 90 120 150 180 210 Time (days) Temperature (degrees F)
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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