ICS Part 2 Statistics Chapter 14 Online Test

The estimated regression line always passes through

• origin A
• 
  B
• x-axis C
• y-axis D

When b_xy is positive, then b_yx will be _______.

• Negative A
• Positive B
• Zero C
• One D

Regression line x on y is

• 
  A
• 
  B
• 
  C
• 
  D

If the value of any regression coefficient is zero, then two variable are _______.

• Qualitative A
• Correlation B
• Dependent C
• Independent D

The straight line graph of the linear equation Y = a + bX, the slope will be upward it_______.

• b = 0 A
• b < 0 B
• b > 0 C
• b ≠ 0 D

If constants are added to or subtracted from the values of the variables, the value of r 

• is negative A
• is positive B
• is zero C
• remains unchanged D

If r = -1, then there is

• negative correlation A
• perfect negative correlation B
• no correlation C
• average correlation D

The variable, whose resulting value depends upon the selected value of the independent variable is called______.

• Regression A
• Regressor B
• Regressand C
• Coefficient D

The relationship that describes the dependence of the expected value of the dependent random variable for a given value of the independent non-random variable is called

• equation A
• relation B
• ratio C
• regression D

r_xy -------------- r_yx

• = A
• < B
• > C
• ≠ D

The estimates of the parameters=α and=β are

• μ and=σ2 A
• a and b B
• μ andπ C
• χ2 and Z D

A relationship where the flow of the data points is best represented by a curve is called_______.

• Linear positive A
• Linear negative B
• Linear relationship C
• Nonlinear relatiobship D

• 
  A
• b_yx B
• b_xy C
• S_p D

The variable that forms the basis of estimation is called

• regression A
• regressand B
• regressor C
• correlation D

• 37 A
• 132 B
• 32 C
• cannot be calculated D

• y-intercept A
• x-intercept B
• slope C
• none of these D

In simple linear regression, the number of unknown constants are:

• Two A
• Three B
• Four C
• Five D