True Or False Chapter 10 - Cause And Effect: Correlation And Regression
11 Questions
| Total Attempts: 96
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Questions and Answers
- 1.A graphical picture of bivariate data is called a line diagram.
- A.
True
- B.
False
- 2.Correlation measures the strength of the association between two variables.
- A.
True
- B.
False
- 3.Regression defines the relationship between the two variables.
- A.
True
- B.
False
- 4.Correlation is measured on a scale from 0 to 1.
- A.
True
- B.
False
- 5.The least squares regression line maximises the sum of the squared errors.
- A.
True
- B.
False
- 6.A perfect linear relationship between two variables means that all the points lie on a straight line.
- A.
True
- B.
False
- 7.Spearman's rank correlation coefficient is used for nominal data.
- A.
True
- B.
False
- 8.A high correlation confirms a causal relationship.
- A.
True
- B.
False
- 9.A negative correlation coefficient means that there is no association between the two variables.
- A.
True
- B.
False
- 10.Pearson's product moment correlation coefficient can only be calculated for numerical data.
- A.
True
- B.
False
- 11.The coefficient b in the linear regression model represents the slope of the regression line.
- A.
True
- B.
False
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