Top 150+ Solved Statistics MCQ Questions Answer

From 136 to 148 of 148

Q. If two variables, x and y, have a very strong linear relationship, then ____________

a. there is evidence that x causes a change in y

b. there is evidence that y causes a change in x

c. there might not be any causal relationship between x and y

d. None of these alternatives is correct.

  • c. there might not be any causal relationship between x and y

Q. If the coefficient of determination is equal to 1, then the correlation coefficient _______

a. must also be equal to 1

b. can be either -1 or +1

c. can be any value between -1 to +1

d. must be -1

  • b. can be either -1 or +1

Q. In regression analysis, if the independent variable is measured in kilograms, the dependent variable ______

a. must also be in kilograms

b. must be in some unit of weight

c. cannot be in kilograms

d. can be any units

  • d. can be any units

Q. If the correlation coefficient is a positive value, then the slope of the regression line ___________

a. must also be positive

b. can be either negative or positive

c. can be zero

d. can not be zero

  • d. can not be zero

Q. If the coefficient of determination is 0.81, the correlation coefficient __________

a. is 0.6561

b. could be either + 0.9 or - 0.9

c. must be positive

d. must be negative

  • a. is 0.6561

Q. A fitted least squares regression line ____________

a. may be used to predict a value of y if the corresponding x value is given

b. is evidence for a cause-effect relationship between x and y

c. can only be computed if a strong linear relationship exists between x and y

d. None of these alternatives is correct.

  • b. is evidence for a cause-effect relationship between x and y

Q. Assume the same variables as in question 28 above; height is measured in feet and weight is measured in pounds. Now, suppose that the units of both variables are converted to metric (meters and kilograms). The impact on the slope is__________

a. the sign of the slope will change

b. the magnitude of the slope will change

c. both a and b are correct

d. neither a nor b are correct

  • a. the sign of the slope will change
Subscribe Now

Get All Updates & News