MBAQ-104: Quantitative Techniques – Unit 5
Objectives: scatter diagram; covariance between two variables; correlation coefficient; least square estimation method of regression; and partial and multiple correlation and regression.
Materials:
The relevant material is available here.
Questions:
- The regression equations involving variables are Y = 5.6 +1.2x and X = 12.5 + 0.6Y. Find the arithmetic means of x and y and the correlation coefficient between them?
- Explain the terms explained variation and unexplained variation. If the correlation of coefficient between the variables x and y is 0.92 what percentage of total variation remains unexplained by the regression equation?