Please answer all questions fully, data included below. For the data in the accompanying table, the percentage of alcohol, X1, and the amount of chlorides, X2, were used to predict the quality of red wines from 0 (very bad) to 10 (excellent), resulting in the equation Yi=1.066+0.504X1i−9.543X2i. Develop a regression model that includes the percentage of alcohol, the chlorides, and the interaction of the percentage of alcohol and the chlorides to predict wine quality. Complete parts (a) and (b) below. Quality Alcohol (%) Chlorides (%) 6 10 0.067 6 11.8 0.064 5 9.1 0.076 5 9.5 0.096 8 12.7 0.078 6 9.7 0.076 6 9.6 0.091 5 9.6 0.072 6 10.7 0.071 5 9.4 0.077 6 10.5 0.106 5 10.5 0.074 6 10.8 0.069 6 10.6 0.085 6 11.4 0.175 5 10.7 0.075 6 10.4 0.066 5 9.6 0.069 5 10.7 0.055 6 10.7 0.077 5 11.3 0.055 5 9.6 0.088 6 10.9 0.067 6 9.9 0.11 8 13.2 0.075 7 12.4 0.072 6 9.5 0.092 5 9.7 0.082 7 11.5 0.09 6 9.2 0.085 6 14 0.066 6 11.1 0.059 6 10.1 0.053 7 10.9 0.08 6 11.6 0.077 4 9.6 0.074 4 9.8 0.078 5 10 0.073 5 11.4 0.053 5 9.9 0.093 6 11.6 0.085 3 9.9 0.145 4 10 0.147 5 9.6 0.089 6 11.6 0.077 4 10.9 0.068 8 10.1 0.061 3 9.7 0.266 8 14 0.045 4 9 0.085
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.
Please answer all questions fully, data included below.
For the data in the accompanying table, the percentage of alcohol, X1, and the amount of chlorides, X2, were used to predict the quality of red wines from 0 (very bad) to 10 (excellent), resulting in the equation Yi=1.066+0.504X1i−9.543X2i. Develop a regression model that includes the percentage of alcohol, the chlorides, and the interaction of the percentage of alcohol and the chlorides to predict wine quality. Complete parts (a) and (b) below.
| Quality | Alcohol (%) | Chlorides (%) |
| 6 | 10 | 0.067 |
| 6 | 11.8 | 0.064 |
| 5 | 9.1 | 0.076 |
| 5 | 9.5 | 0.096 |
| 8 | 12.7 | 0.078 |
| 6 | 9.7 | 0.076 |
| 6 | 9.6 | 0.091 |
| 5 | 9.6 | 0.072 |
| 6 | 10.7 | 0.071 |
| 5 | 9.4 | 0.077 |
| 6 | 10.5 | 0.106 |
| 5 | 10.5 | 0.074 |
| 6 | 10.8 | 0.069 |
| 6 | 10.6 | 0.085 |
| 6 | 11.4 | 0.175 |
| 5 | 10.7 | 0.075 |
| 6 | 10.4 | 0.066 |
| 5 | 9.6 | 0.069 |
| 5 | 10.7 | 0.055 |
| 6 | 10.7 | 0.077 |
| 5 | 11.3 | 0.055 |
| 5 | 9.6 | 0.088 |
| 6 | 10.9 | 0.067 |
| 6 | 9.9 | 0.11 |
| 8 | 13.2 | 0.075 |
| 7 | 12.4 | 0.072 |
| 6 | 9.5 | 0.092 |
| 5 | 9.7 | 0.082 |
| 7 | 11.5 | 0.09 |
| 6 | 9.2 | 0.085 |
| 6 | 14 | 0.066 |
| 6 | 11.1 | 0.059 |
| 6 | 10.1 | 0.053 |
| 7 | 10.9 | 0.08 |
| 6 | 11.6 | 0.077 |
| 4 | 9.6 | 0.074 |
| 4 | 9.8 | 0.078 |
| 5 | 10 | 0.073 |
| 5 | 11.4 | 0.053 |
| 5 | 9.9 | 0.093 |
| 6 | 11.6 | 0.085 |
| 3 | 9.9 | 0.145 |
| 4 | 10 | 0.147 |
| 5 | 9.6 | 0.089 |
| 6 | 11.6 | 0.077 |
| 4 | 10.9 | 0.068 |
| 8 | 10.1 | 0.061 |
| 3 | 9.7 | 0.266 |
| 8 | 14 | 0.045 |
| 4 | 9 | 0.085 |
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