Five observations taken for two variables follow. xi 3 6 11 2 18 yi 50 50 40 60 30 Compute the sample covariance. If needed, round your answer to one decimal digit. If your answer is negative use “minus sign”. Interpret the sample covariance. The input in the box below will not be graded, but may be reviewed and considered by your instructor. (c) Compute the sample correlation coefficient. If needed, round your answer to three decimal digits. If your answer is negative use “minus sign”. Interpret the sample correlation coefficient. The input in the box below will not be graded, but may be reviewed and considered by your instructor
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.
Five observations taken for two variables follow.
| xi | 3 | 6 | 11 | 2 | 18 |
| yi | 50 | 50 | 40 | 60 | 30 |
| Compute the sample |
|
| Interpret the sample covariance. | |
| The input in the box below will not be graded, but may be reviewed and considered by your instructor. | |
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|
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| (c) | Compute the sample |
| Interpret the sample correlation coefficient. | |
| The input in the box below will not be graded, but may be reviewed and considered by your instructor. |
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