Quiz on Regression Analysis

In the equation y' = 3 + 4x, what is the slope?

• 3

• y'

• 4

• 4x

What is the value of the y-intercept in the equation y' = 10 - 2x?

• y'

• 10

• -2

• -10

Which of the following scenarios could give you a meaningful regression analysis?

• The value of r is not significant

• Strong negative linear relationship between the variables

• No linear relationship between the variables

• Correlation will be done after the regression analysis

In a regression line, how do you call the magnitude of the change in one variable when the other variable changes at a unit?

• Unit change

• Variable change

• marginal change

• regression change

If the equation of the regression line is y' = 5 + 0.123x, how can it be interpreted?

• The slope of the line is 0.123

• Every unit of change in x, y changes at 5 units

• Every unit of change in y, x changes at 5 units

• Every unit of change in x, y changes at 0.123 unit

What is the formula for the slope b in a regression line?

• b = (Σy)(Σx²) - (Σx)(Σxy)

• b = (Σx)(Σy) / n

• b = (Σy) / (Σx)

• b = (n(Σxy) - (Σx)(Σy)) / (n(Σx²) - (Σx)²)

What does the y-intercept represent in a regression line?

• The maximum value of y

• The average change in y

• The slope of the line

• The value of y when x is 0

If the Pearson coefficient r is found to be insignificant, what would be the expected result of the regression analysis?

• The regression analysis will be pointless

• The regression analysis will be meaningful

• The regression line will be flat

• The regression line will be steep

What is the expected score if a student studies for 14 hours according to the regression equation y' = 75.667 + 1.583x?

• 89.000

• 100.000

• 75.667

• 97.829

What is the primary purpose of regression analysis?

• To determine the median of a dataset

• To predict the value of a dependent variable

• To find the mean of a dataset

• To calculate the mode of a dataset