22
Jan
Class 9 | Chapter 11 | Constructions | Construction 11.1
Construction 11.1: To construct the bisector of a given angle. Class 9 | Home Construction 11.2
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21
Jan
Statistics Quiz for Class 9
Statistics Quiz for Class 9 | Online MCQ test with answers If you have already watched the chapter 14 videos (Statistics) then you are good to attempt the following quiz. Good luck!!!
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21
Jan
Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 5 & 6
Question 5: Find the mean salary of 60 workers of a factory from the following table: Question 6: Give one example of a situation in which (i) the mean is an appropriate measure of central tendency. (ii) the mean is…
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21
Jan
Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 3 & 4
Question 3: The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x + 2, 72, 78, 84, 95 Question 4: Find the…
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21
Jan
Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 1 & 2
Question 1: The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 Find the mean, median and mode of these scores. Question 2: In…
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21
Jan
Measures of Central Tendency
Measures of Central Tendency Very often we need to analyse a given data to find a value that can represent the entire data set. In other words we say the central tendency of the data set. Different types of data…
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21
Jan
Class 9 | Chapter 14 | Statistics | Example 14 & 15
Example 14: Find the mode of the following marks (out of 10) obtained by 20 students: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9,9 Example 15: Consider a small…
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21
Jan
Class 9 | Chapter 14 | Statistics | Example 12 & 13
Example 12: The heights (in cm) of 9 students of a class are as follows: 155 160 145 149 150 147 152 144 148 Find the median of this data. Example 13: The points scored by a Kabaddi team in…
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21
Jan
Class 9 | Chapter 14 | Statistics | Example 10 & 11
Example 10: 5 people were asked about the time in a week they spend in doing social work in their community. They said 10, 7, 13, 20 and 15 hours, respectively. Find the mean (or average) time in a week…
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17
Jan
Class 9 | Chapter 14 | Statistics | Exercise 14.3 | Question 9
Question 9: 100 surnames were randomly picked up from a local telephone directory and a frequency distribution of the number of letters in the English alphabet in the surnames was found as follows: (i) Draw a histogram to depict the…
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