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Class 11 Economics (Statistics For Economics) Chapter 6 Measures Of Dispersion Quiz 1 (25 MCQs)

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1. The interquartile range of a set of data is 18. Find the new interquartile range if each value in the set of data is multiplied by 4.
2. In a 100 item test, the passing mark is the 3rd quartile. What does it imply?
3. What is Scooby Doo's full name?
4. A set of of data has a minimum value of 15 and a maximum value of 40. Find the new range if two numbers, 8 and 35, are added to the set of the data.
5. Which of the following class interval has a midpoint 145.5?
6. ..... is equal to the value corresponding to cumulative frequency 3(N+1)/4 from simple frequency distribution.
7. Find the range of these numbers:15, 2, 3, 7, 8, 4, 3, 2, 16, 2, 4
8. What is the variance for the data given:\{12, 13, 29, 18, 61, 35, 21\}
9. Which of the following is not a measure of dispersion?
10. The measure of dispersion which is expressed in terms of the nits of observations .....
11. Between Virat and Rohit, who is a consistent batsmen
12. Four data sets are shown below. Set 1:\{19, 19, 19, 19, 19\} Set 2:\{5, 10, 15, 20, 25\} Set 3:\{9, 10, 11, 12, 13\} Set 4:\{5, 20, 28, 36, 51\} Which data set has the smallest standard deviation?
13. A set of data contains 20 numbers. The sum of the numbers is 284 and the sum of the squares of the numbers is 4 688. Calculate the standard deviation of the set of data.
14. Which of the following is NOT a measure of dispersion for grouped data? (a) Range (b) Mean (c) Interquartile Range (d) Standard Deviation
15. It is defined as the square root of the variance.
16. What is the standard deviation for the data given:5, 10, 7, 12, 0, 20, 15, 22, 8, 2
17. Sum of the frequency for a level and the others before it
18. The numerical value of the standard deviation can never be
19. Quartile deviation with Q1 = 25 and Q3 = 75 is equal to
20. How can you use the SUM function to add a range of cells in a spreadsheet?
21. What is the relationship between variance and standard deviation?
22. The range and the variance of a set of numbers y1, y2, ..... , y15 are 8 and 4.5 respectively.Calculate the range and the variance of the set of numbers $\frac{2y_1+15}{5}, \\frac{2y_2+1}{5}, \\frac{2y_3+1}{5}, \ ..... \, \\frac{2y_{15}+1}{5}.$
23. ..... in particular helps in finding the variability of the data
24. If the salary of 10 employees are identical i.e. $ 4000, then its mean deviation from Mean is
25. Explain the concept of interquartile range.
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