(a) Which correlation coefficient would be the most accurate? r= -0.30 Or= -0.70 O r= 0.30 Or= 0.70 (b) It appears that a possible outlier is located at (-2.4, -0.6). If that point is removed from the data set, what would happen to the correlation coefficient? O It would become a weaker negative correlation. O It would become a weaker positive correlation. O It would become a stronger negative correlation. O It would become a stronger positive correlation.
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.
![Use the following scatterplot to answer the questions below.
-1
-3
-3
-2
-1
1
(a) Which correlation coefficient would be the most accurate?
O r= -0.30
O r = -0.70
O r= 0.30
O r= 0.70
(b) It appears that a possible outlier is located at (-2.4, -0.6). If that point is removed from the data set, what would happen to the correlation coefficient?
O It would become a weaker negative correlation.
O It would become a weaker positive correlation.
O It would become a stronger negative correlation.
O It would become a stronger positive correlation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb8556818-920a-42ee-ab8c-93bae655fdad%2F6a75d205-92cf-48f3-8d93-1a3dbdfaa035%2F3noew_processed.png&w=3840&q=75)
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