un a regression analysis on the following data set, where yy is the final grade in a math class and xx is the average number of hours the student spent working on math each week. hours/week x Grade y 8 55.2 8 62.2 8 53.2 10 70 13 83.2 15 78 17 100 18 87.2 20 100 20 100 State the regression equation with constants accurate to 2 decimal places. ˆyy^ = x + What is the predicted value for the final grade when a student spends an average of 7 hours each week on math?
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.
un a
| hours/week x |
Grade y |
|---|---|
| 8 | 55.2 |
| 8 | 62.2 |
| 8 | 53.2 |
| 10 | 70 |
| 13 | 83.2 |
| 15 | 78 |
| 17 | 100 |
| 18 | 87.2 |
| 20 | 100 |
| 20 | 100 |
State the regression equation with constants accurate to 2 decimal places.
ˆyy^ = x +
What is the predicted value for the final grade when a student spends an average of 7 hours each week on math?
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