Chapter 2 ECONOMICS : Dispersion Correlation and Index Numbers — Online MCQ Test
ECONOMICS · CLASS 12 INTER II YEAR · Andhra State Board
Practice Chapter 2 ECONOMICS : Dispersion Correlation and Index Numbers with a free chapter-wise online MCQ test.
This chapter covers: This chapter details measures of dispersion Karl Pearson coefficient of correlation Spearman rank correlation and index numbers construction and applications..
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Chapter 2 ECONOMICS : Dispersion Correlation and Index Numbers — Important Questions & Answers
Which of the following is considered an absolute measure of dispersion?
- A. Coefficient of variation
- B. Standard deviation
- C. Coefficient of range
- D. Coefficient of quartile deviation
Answer: B. Standard deviation
Standard deviation is an absolute measure of dispersion as it is expressed in the same units as the original data, unlike coefficients which are ratios.
Standard deviation is an absolute measure of dispersion as it is expressed in the same units as the original data, unlike coefficients which are ratios.
The range is defined as the difference between:
- A. Mean and mode
- B. Maximum and minimum values
- C. Upper and lower quartiles
- D. Standard deviation and mean
Answer: B. Maximum and minimum values
Range is calculated by subtracting the smallest value from the largest value in a data set.
Range is calculated by subtracting the smallest value from the largest value in a data set.
If the value of correlation coefficient (r) is -1, the correlation is said to be:
- A. Perfectly positive
- B. Perfectly negative
- C. No correlation
- D. Low negative
Answer: B. Perfectly negative
A correlation coefficient of -1 indicates a perfect inverse relationship between the variables.
A correlation coefficient of -1 indicates a perfect inverse relationship between the variables.
Calculate the range if the maximum value is 85 and the minimum value is 20.
- A. 65
- B. 105
- C. 4.25
- D. 60
Answer: A. 65
Range = Maximum - Minimum. So, 85 - 20 = 65.
Range = Maximum - Minimum. So, 85 - 20 = 65.
Given Variance = 144, what is the Coefficient of Variation if the Mean is 60?
- A. 20%
- B. 24%
- C. 12%
- D. 2.4%
Answer: A. 20%
Standard deviation = sqrt(144) = 12. CV = (SD/Mean) * 100 = (12/60) * 100 = 20%.
Standard deviation = sqrt(144) = 12. CV = (SD/Mean) * 100 = (12/60) * 100 = 20%.