Construct amount of tar and carbon monoxide (CO) in cigarettes. Use tar for the horizontal scale and use carbon monoxide (CO) for the vertical scale. Determine whether there appears to be a relationship between cigarette tar and CO. Full data set D co 14 11 17 18 18 scatter diagram using the data table to the right. This data is from a study comparing the Co 15 12 Tar Tar Tar CO 16 13 2 3 10 8 16 16 1 1 17 6 7 10 9 18 10 10 17 16 17 Construct a scatter diagram. OA. OB. OC. OD. ACO 20- ACO 20- 165 12 CO 20- ACO 20- 165 16- 165 125 8 5 125 125 8- 8- 4- 4- 4- Tar C 0 4 8 12 16 20 04 Ó 4 8 1216 20 0- O 4 8 12 1620 ó 4 8 O 4 8 12 16 20 Is there a relationship between cigarette tar and CO? O A. Yes, as the amount of tar increases the amount of carbon monoxide decreases. O B. No, there appears to be no relationship. O C. Yes, as the amount of tar increases the amount of carbon monoxide also increases.
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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