Grade 7 Mathematics ā Data handling Quiz
1. The range of the data : 21, 6, 17, 18, 12, 8, 4, 13 is......
2. Most frequent occurring value in a series is called..........
3. The mean of the first five natural numbers is........
4. The mean of the first five whole numbers is..........
5. The number of students in different classes of a school are 33, 38, 48, 33, 34, 34, 33 and 24. The mode of this data is......
6. The median of the data : 3, 4, 5, 6, 7, 3, 4 is..........
7. Out of 5 brands of chocolates in a shop, a boy has to purchase the brand which is most liked by children. What measure of central tendency would be most appropriate if the data is provided to him?
8. Let x, y, z be three observations. The mean of these observations is.........
9. Which measure of central tendency best represents the data of the most popular politician after a debate?
10. Representation of Data using rectangles of uniform width and equal spacing between them is called____
11. Arranging the numerical figures in ascending or descending order is called_______
12. The bars used to count the frequencies are called_____
13. Information in the form of numerical figures is called _____
14. What do we call the data represented in the form of pictures?
15. Find the median of the following set of data: 2 3 6 8 9 11 12.
16. Which among the following is NOT a measure of central tendency?
17. The number of times a particular observation occurs is called its _______
18. The probability of an event always lies between____
19. What is the range of first 20 natural numbers?
20. When a cricket team is compared with another team for their performance as a team, the most suitable measure of central tendency is ______
21. In a data , 10 numbers are arranged in increasing order . If the 7th entry is increased by 4 , by how much the median increased.
22. Out of 5 brands of chocolates in a shop, a boy has to purchase the brand which is most liked by children. What measure of central tendency would be most appropriate if the data is provided to him?
23. Which measures of central tendency get affected if the extreme observations on both the ends of a data arranged in descending order are removed?
24. On tossing a coin, the outcome is.......
25. The median of observations 11, 12, 14, 18, x + 2, 20, 22, 25, 61 arranged in ascending order is 21. The value of x is
26. The probability of getting a number greater than 2 on throwing a die once is....
27. The mean of first five prime numbers is...
28. Which of the following is not a measure of central tendency?
Range is a measure of dispersion, not central tendency.
29. What is the probability of rolling a 6 on a fair six-sided dice?
There is only 1 way to roll a 6 out of 6 possible outcomes, so the probability is 1/6.
30. Which of the following is a statistical representation of the relationship between variables?
The correlation coefficient measures the strength and direction of a linear relationship between two variables.
31. In a survey, 60% of participants preferred apples and 40% preferred oranges. What is the complementary probability of preferring oranges?
The complementary probability is 100\% - 40\% = 60\%.
32. Which of the following is an example of qualitative data?
Qualitative data is descriptive and categorical, such as gender.
33. What is the median of the set: {4, 7, 3, 8, 5}?
Arranging the data in ascending order: {3, 4, 5, 7, 8}, the median is the middle value, which is 5.
34. What is the mode of the set: {2, 4, 3, 4, 6}?
The mode is the number that appears most frequently, which is 4 in this case.
35. If the probability of rain tomorrow is 0.3, what is the probability of no rain?
The probability of no rain is the complement of the probability of rain, so it is 1 - 0.3 = 0.7.
36. Which of the following best describes a frequency distribution?
A frequency distribution is a table that shows how data is distributed across different categories or intervals.
37. What is the expected value of rolling a fair six-sided dice?
The expected value is the average outcome over many trials, which is (1+2+3+4+5+6)/6 = 3.5.