1. Any measure indicating the centre of a set of data, arranged in an increasing or decreasing order of magnitude, is called a measure of
Correct : C. Central tendency
2. Scores that differ greatly from the measures of central tendency are called:
Correct : C. Extreme scores
3. The measure of central tendency listed below is:
Correct : B. The mean
4. The total of all the observations divided by the number of observations is called:
Correct : A. Arithmetic mean
5. While computing the arithmetic mean of a frequency distribution, the each value of a class is considered equal to:
Correct : B. Lower limit
6. The sum of the squares fo the deviations about mean is:
Correct : C. Minimum
7. For a certain distribution, if ∑(X -20) = 25, ∑(X- 25) =0, and ∑(X-35) = -25, then is equal to:
Correct : B. 25
8. The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from
Correct : D. Arithmetic mean
9. If X1, X2, X3, ... Xn, be n observations having arithmetic mean and if Y =4X
± 2, then is equal to:
Correct : C. 4 ± 2
10. If =100 and Y=2X – 200, then mean of Y values will be:
Correct : A. 0
11. If the arithmetic mean of 20 values is 10, then sum of these 20 values is:
Correct : C. 200
12. Ten families have an average of 2 boys. How many boys do they have together?
Correct : D. 20
13. If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:
Correct : C. 7
14. We must arrange the data before calculating:
Correct : B. Median
15. The lower and upper quartiles of a symmetrical distribution are 40 and 60 respectively. The value of median is:
Correct : B. 50
16. If in a discrete series 75% values are greater than 50, then:
Correct : A. Q1 = 50
17. Suitable average for averaging the shoe sizes for children is
Correct : B. Mode
18. A measurement that corresponds to largest frequency in a set of data is called:
Correct : C. Mode
19. Which of the following average cannot be calculated for the observations 2, 2, 4, 4, 6, 6, 8, 8, 10, 10 ?
Correct : C. Mode
20. What have been constructed from OR problems and methods for solving the models that are available in many cases?
Correct : C. Mathematical models
21. Which of the following is not the phase of OR methodology?
Correct : D. Controlling the environment
22. Operations research is the application of methods to arrive at the optimal solutions to the problems.
Correct : B. Scientific
23. In operations research, the are prepared for situations.
Correct : A. Mathematical models
24. OR can evaluate only the effects of .
Correct : C. Numeric and quantifiable factors
25. Which technique is used in finding a solution for optimizing a given objective, such as profit maximization or cost reduction under certain constraints?
Correct : D. Linear Programming
26. By constructing models, the problems in libraries increase and cannot be solved.
Correct : B. FALSE
27. A solution can be extracted from a model either by
Correct : C. Both A and B
28. The main limitation of operations research is that it often ignores the human element in the production process.
Correct : A. TRUE
29. Feasible solution satisfies
Correct : C. Both A and B
30. What is the objective function in linear programming problems?
Correct : C. A linear function in an optimization problem