Regression Analysis

If correlation analysis is used to determine whether a relationship exists between two variables, what is regression analysis for?

• To determine if there is a positive correlation between the variables.

• To predict the value of independent variable given the dependent variable.

• To determine whether the relationship between the variables is significant.

• To predict the value of dependent variable given the independent variable.

Which of the following is not true about the regression line?

• It is the line of the best fit.

• It is the line closest to the points.

• It is the trend line.

• It is the line closest to dependent variable.

Given the equation of a line: y = -5x + 6, what is the value of y when x = 8?

• 34

• -34

• 0.4

• -0.4

Given the equation of a line: y = 9x/2 - 6, which of the following is the slope?

• 9

• 6

• 9/2

• -6

Given the equation of a line: y = 9x/2 - 6, which of the following is the y-intercept?

• 9

• 6

• 9/2

• -6

A physicist studied the relationship of altitude and gravitational acceleration. Which of the following is true about their correlation?

• They are negatively correlated.

• They are positively correlated.

• They are not correlated.

• None of these.

A physicist studied the relationship of altitude and gravitational acceleration. Which of the following is the dependent variable?

• altitude

• gravitational acceleration

• cannot determine

• can be both

A physicist studied the relationship of altitude and gravitational acceleration. Which of the following is the independent variable?

• altitude

• gravitational acceleration

• cannot determine

• can be both

An educator wants to study the relationship between the students' IQ score and academic performance. Which of the following is the independent variable?

• IQ score

• academic performance

• cannot determine

• can be both

An educator wants to study the relationship between the students' IQ score and academic performance. Which of the following is the dependent variable?

• IQ score

• academic performance

• cannot determine

• can be both