Question

1. State whether the following statements are true or false. _1. The value of b in the regression equation is known as the intercept. 2. The more the points are separated in a scatter diagram, the greater the degree of association between the variables. 3. The main reason for expressing the relationship between two variables through a regression equation is to be able to estimate the value of one variable when the value of another is known. 4. The closer the value of r is to -1, the less relationship the variables have to each other. 5. The purpose of correlation analysis is to describe the nature of the relationship between two variables. 6. Time series analysis helps us explain the past and predict the future. 7. It is usual to use the least squares method to estimate a straight line that describes the relationship that exists between two variables. 8. If the time series formula is used in an even distribution and the following formula Y = 35 + 10 (t) appears. This means that for each year that passes Y increases by 10. 9. When calculating the standard error for a linear regression, two degrees of freedom are always lost. I 10. The determination index for a linear regression never assumes a negative value. Sant 0 Focus

Answer 1

1. False

b is the slope not intercept.

2. False

If points are more scattered then there is low degree association between the variables.

3. True

4. False

If the value of r is close to -1 then there is strong negative correlation between variables.

5. True