A. Graphic correlation
B. Scatter diagrams
C. None of these
D. Both of these
✅ The correct answer is option D.
A scatter diagram is________
A. A statistical test
B. Linear
C. Curvilinear
D. A graph showing x and y values
✅ The correct answer is option D.
If there exists any relation between the sets of variables, it is called__________
A. Regression
B. Skewness
C. Correlation
D. All of these
✅ The correct answer is option C.
Perfect correlation is one Perfect correlation is one in which_________
A. Area of a circle is in definite constant relationship with radius
B. When area of the circle is ½ radius
C. None of these
D. All of these
✅ The correct answer is option C.
Which of the following measurement scales is required for the valid calculation of Karl Pearson’s correlation coefficient?__________
A. Ordinal
B. Interval
C. Ratio
D. Nominal
✅ The correct answer is option A.
Which of the following point is not related with the utility of correlation?________
A. Relation between two variables
B. Help in decision making
C. Useful in research work
D. All of these
✅ The correct answer is option D.
Which of the following is not cause of the correlation?____________
A. Direct relationship
B. Correlation due to any other common cause
C. Mutual Reaction
D. None of these
✅ The correct answer is option D.
Which of the following is the highest range of r?__________
A. 0 and 1
B. -1 and 0
C. -1 and 1
D. None of these
✅ The correct answer is option C.
When the correlation coefficient between x and y is positive, then as variable x decreases, variable y Remains the same________
A. Increases
B. Decreases
C. Changes linearly
D. none
✅ The correct answer is option B.
Which of the following is most likely to be an inverse relationship?__________
A. Between income and expenditure on education
B. Between price increase and demand for a certain product
C. Between average number of hours studied per day and the performance of the students in the examination
D. Between advertising expenditure and sales of a product.
✅ The correct answer is option B.