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Class 10 Maths Chapter 14 Statistics Quiz 4 (25 MCQs)

Quiz Instructions

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1. The average weight of a group of 25 men was calculated to be 78.4 kg. It was discovered later that one weight was wrongly entered as 69 kg instead of 96 kg. The correct average is .....

Correct Answer: C) 79.48.

2. How many percent corresponds to Q$_{3}$ if you will interpret it? $^{ }$

Correct Answer: C) $^{ }$C. 75%.

3. What do bar graphs typically display?

Correct Answer: A) Categorical and numeric variables arranged in class intervals.

4. Why are diagrams particularly effective in presenting statistical data?

Correct Answer: B) They attract attention and offer a quick way to grasp results.

5. What is another name for pie charts?

Correct Answer: C) Angular Circle Diagrams.

6. . Mean of 20 observations is 17. If in the observations, observation 40 is replaced by 12, find the new mean

Correct Answer: A) 15.6.

7. The mean of 10 numbers is 27 if 2 is added to each number find the new mean

Correct Answer: A) 29.

8. The graphical representation of a cumulative frequency distribution is called

Correct Answer: D) Warhead.

9. In an 80-item test, the passing mark is the 3$^{rd}$ quartile. What does it imply?

Correct Answer: A) The students should answer at least 60 items correctly.

10. In a 70 item test, Melody got a score of 50 which is the third quartile. This means that

Correct Answer: B) Her score is higher than 25% of her classmates.

11. What do data flowcharts primarily illustrate?

Correct Answer: B) The channels through which data is transmitted within a system.

12. Which of the following is another name for the mean of a data set?

Correct Answer: A) The average.

13. The median of set of 9 distinct observations is 20.5. If each of the largest 4 observations of the set is increased by 2, then the median of the new set is .....

Correct Answer: D) Remains the same as that of the original set.

14. A table that lists items and shows the frequency or number of times they occur is called .....

Correct Answer: B) Frequency table.

15. What does a functional, top-down organizational chart typically display?

Correct Answer: B) The organizational hierarchy with the C-Suite at the top, followed by senior management, middle managers, etc.

16. Determine the mean of first 10 natural numbers.

Correct Answer: A) 5.5.

17. If the mean of 2, 4, 6, 8, x, y is 5 then the value of x+y is

Correct Answer: A) 10.

18. What is the most commonly used two-dimensional diagram?

Correct Answer: C) Pie diagram.

19. What is the simplest type of bar diagram?

Correct Answer: C) Simple bar diagram.

20. According to Veronis in his 1978 book "Microprocessors:Design and Applications, " which of the following is the basis for outlining flowchart types?

Correct Answer: C) Scope and level of detail.

21. What is mode of the data 5, 6, 5, 9, 5, 6, 10, 11, 5, 6, 7, 6, 9, 5

Correct Answer: B) 5.

22. What are the potential benefits and drawbacks of a matrix organizational structure?

Correct Answer: B) It facilitates better communication and flexibility but can cause confusion with priorities and supervisors.

23. What is mode of the data 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5

Correct Answer: D) No mode.

24. What is Mode of the data 10, 15, 12, 15, 10, 11, 15, 10, 18, 10, 17, 15

Correct Answer: A) 10, 15.

25. What is the mode?

Correct Answer: A) # happening the most.

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