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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 |

A. | Skewness |

B. | Symmetry |

C. | Central tendency |

D. | Dispersion |

Answer» C. Central tendency |

2. |
## Scores that differ greatly from the measures of central tendency are called: |

A. | Raw scores |

B. | The best scores |

C. | Extreme scores |

D. | Z-scores |

Answer» C. Extreme scores |

3. |
## The measure of central tendency listed below is: |

A. | The raw score |

B. | The mean |

C. | The range |

D. | Standard deviation |

Answer» B. The mean |

4. |
## The total of all the observations divided by the number of observations is called: |

A. | Arithmetic mean |

B. | Geometric mean |

C. | Median |

D. | Harmonic mean |

Answer» A. Arithmetic mean |

5. |
## While computing the arithmetic mean of a frequency distribution, the each value of a class is considered equal to: |

A. | Class mark |

B. | Lower limit |

C. | Upper limit |

D. | Lower class boundary |

Answer» B. Lower limit |

6. |
## The sum of the squares fo the deviations about mean is: |

A. | Zero |

B. | Maximum |

C. | Minimum |

D. | All of the above |

Answer» C. Minimum |

7. |
## For a certain distribution, if ∑(X -20) = 25, ∑(X- 25) =0, and ∑(X-35) = -25, then is equal to: |

A. | 20 |

B. | 25 |

C. | -25 |

D. | 35 |

Answer» 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 |

A. | Harmonic mean |

B. | Geometric mean |

C. | Median |

D. | Arithmetic mean |

Answer» D. Arithmetic mean |

9. |
## If X1, X2, X3, ... Xn, be n observations having arithmetic mean and if Y =4X ± 2, then is equal to: |

A. | 4X |

B. | 4 |

C. | 4 ± 2 |

D. | 4 ± 2 |

Answer» C. 4 ± 2 |

10. |
## If =100 and Y=2X – 200, then mean of Y values will be: |

A. | 0 |

B. | 2 |

C. | 100 |

D. | 200 |

Answer» A. 0 |

11. |
## If the arithmetic mean of 20 values is 10, then sum of these 20 values is: |

A. | 10 |

B. | 20 |

C. | 200 |

D. | 20 + 10 |

Answer» C. 200 |

12. |
## Ten families have an average of 2 boys. How many boys do they have together? |

A. | 2 |

B. | 10 |

C. | 12 |

D. | 20 |

Answer» D. 20 |

13. |
## If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is: |

A. | 3 |

B. | 5 |

C. | 7 |

D. | 10 |

Answer» C. 7 |

14. |
## We must arrange the data before calculating: |

A. | Mean |

B. | Median |

C. | Mode |

D. | Geometric mean |

Answer» B. Median |

15. |
## The lower and upper quartiles of a symmetrical distribution are 40 and 60 respectively. The value of median is: |

A. | 40 |

B. | 50 |

C. | 60 |

D. | (60 – 40) / 2 |

Answer» B. 50 |

16. |
## If in a discrete series 75% values are greater than 50, then: |

A. | Q1 = 50 |

B. | Q1 < 50 |

C. | Q1 > 50 |

D. | Q1 ≠ 50 |

Answer» A. Q1 = 50 |

17. |
## Suitable average for averaging the shoe sizes for children is |

A. | Mean |

B. | Mode |

C. | Median |

D. | Geometric mean |

Answer» B. Mode |

18. |
## A measurement that corresponds to largest frequency in a set of data is called: |

A. | Mean |

B. | Median |

C. | Mode |

D. | Percentile |

Answer» C. Mode |

19. |
## Which of the following average cannot be calculated for the observations 2, 2, 4, 4, 6, 6, 8, 8, 10, 10 ? |

A. | Mean |

B. | Median |

C. | Mode |

D. | All of the above |

Answer» C. Mode |

20. |
## What have been constructed from OR problems and methods for solving the models that are available in many cases? |

A. | Scientific models |

B. | Algorithms |

C. | Mathematical models |

D. | None of these |

Answer» C. Mathematical models |

21. |
## Which of the following is not the phase of OR methodology? |

A. | Formulating a proble |

B. | Constructing a model |

C. | Establishing controls |

D. | Controlling the environment |

Answer» D. Controlling the environment |

22. |
## Operations research is the application of methods to arrive at the optimal solutions to the problems. |

A. | Economical |

B. | Scientific |

C. | Both A and B |

D. | Artistic |

Answer» B. Scientific |

23. |
## In operations research, the are prepared for situations. |

A. | Mathematical models |

B. | Physical models diagrammatic |

C. | Diagrammatic models |

D. | Both B and C |

Answer» A. Mathematical models |

24. |
## OR can evaluate only the effects of . |

A. | Personnel factors |

B. | Financial factors |

C. | Numeric and quantifiable factors |

D. | Both A and B |

Answer» 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? |

A. | Qualing theory |

B. | Waiting Line |

C. | Both A and B |

D. | Linear Programming |

Answer» D. Linear Programming |

26. |
## By constructing models, the problems in libraries increase and cannot be solved. |

A. | TRUE |

B. | FALSE |

Answer» B. FALSE |

27. |
## A solution can be extracted from a model either by |

A. | Conducting experiments on it |

B. | Mathematical analysis |

C. | Both A and B |

D. | Diversified Technique |

Answer» C. Both A and B |

28. |
## The main limitation of operations research is that it often ignores the human element in the production process. |

A. | TRUE |

B. | FALSE |

Answer» A. TRUE |

29. |
## Feasible solution satisfies |

A. | Only constraints |

B. | only non- negative |

C. | Both A and B |

D. | A, B and optimal solution |

Answer» C. Both A and B |

30. |
## What is the objective function in linear programming problems? |

A. | A constraint for available resource |

B. | An objective for research and development of a company |

C. | A linear function in an optimization problem |

D. | A set of non- negativity conditions |

Answer» C. A linear function in an optimization problem |

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