1071. Which of the following measurement scales is required for the valid calculation of spearman correlation coefficient?_____________
A. Ordinal
B. Interval
C. Nominal
D. Ratio
✅ The correct answer is option B.
UPSC
1072. 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.
1073. 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.
1074. 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.
1075. 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.
1076. 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.
1077. The average of squared deviations from mean is called_____________
A. Mean deviation
B. Variance
C. Standard deviation
D. Coefficient of variation
✅ The correct answer is option B.
1078. Mean deviation computed from a set of data is always____________
A. Negative
B. Equal to standard deviation
C. More than standard deviation
D. Less than standard deviation
✅ The correct answer is option A.
1079. The mean deviation of the scores 12, 15, 18 is_____________
A. 6
B. 0
C. 3
D. 2
✅ The correct answer is option B.
1080. If Y = ax ± b, where a and b are any two numbers but a 0, then M.D(Y) is equal to__________
A. M.D(X)
B. M.D(X) ± b
C. a M.D(X)
D. M.D(Y) + M.D(X)
✅ The correct answer is option D.