statistics Archives – Mathemafia http://sh016.global.temp.domains/~mathemaf/tag/statistics/ Mathematics is like music - Enjoy it!!! Thu, 11 May 2023 08:50:10 +0000 en-US hourly 1 https://wordpress.org/?v=7.1 https://mathemafia.com/wp-content/uploads/2020/08/cropped-M__Logo__SM-1-32x32.png statistics Archives – Mathemafia http://sh016.global.temp.domains/~mathemaf/tag/statistics/ 32 32 Class 10 | Chapter 13 | All Solutions | Statistics (WIP) https://mathemafia.com/class-10-chapter-13-all-solutions-statistics/ Fri, 17 Dec 2021 07:43:48 +0000 http://sh016.global.temp.domains/~mathemaf/?p=7350 This playlist covers all the questions, concepts and examples of chapter 14 (Statistics) of class 10, NCERT book. Click a thumbnail to watch the tutorial. Watch complete chapter on YouTube

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This playlist covers all the questions, concepts and examples of chapter 14 (Statistics) of class 10, NCERT book. Click a thumbnail to watch the tutorial. 

Watch complete chapter on YouTube

The post Class 10 | Chapter 13 | All Solutions | Statistics (WIP) appeared first on Mathemafia.

]]> Class 9 Chapter 12 | All Solutions | Statistics https://mathemafia.com/class-9-chapter-12-all-solutions-statistics/ Thu, 16 Dec 2021 15:36:13 +0000 http://sh016.global.temp.domains/~mathemaf/?p=7193 This playlist covers all the questions, concepts, theorems and examples of chapter 14 (Statistics) of class 9, NCERT textbook. Click a thumbnail to watch the tutorial.  It is recommended to watch the introductory video, displayed as first video in the…

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This playlist covers all the questions, concepts, theorems and examples of chapter 14 (Statistics) of class 9, NCERT textbook. Click a thumbnail to watch the tutorial. 

It is recommended to watch the introductory video, displayed as first video in the list, to understand the underlying concepts of statistics. This video is sufficient for students to understand and solve class 9 chapter 14 statistics chapter. The introduction video covers the concepts of Primary and Secondary data, grouped and ungrouped Frequency Distribution Tables, Class Interval, Overlapping and Non overlapping Class Intervals, Upper and Lower Class Limits. Every concept has been explained in detail in simple day-to-day language with very simple examples. 

Watch complete chapter on YouTube

You may also test your knowledge about the concepts of statistics (Class 9 level) by attempting the following quiz. In this video, you will be asked a set of 15 objective questions to test your knowledge of the concepts of probability. You will be given 15 to 30 seconds to answer after which the correct answer would be displayed. The questions cover mean, median, mode, range, grouped data, classes, class Interval, Histograms, Frequency Polygons, Bar Graphs. Good luck!!!

Following three types of graphs are very basic graphs that one must learn in statistics:

  1. Bar Graphs
  2. Histogram (of Uniform as well as varying width)
  3. Frequency Polygons

It is very important for students to have a very good understanding of these topics, not just for class 9 statistics but in general as well. You can get an idea from the charts that are displayed during cricket matches: Score comparison, averages of players in different years or countries etc. 

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]]> Statistics Quiz for Class 9 https://mathemafia.com/statistics-quiz-for-class-9/ Thu, 21 Jan 2021 05:19:50 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5151 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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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!!!

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

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]]> Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 5 & 6 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-4-question-5-6/ Thu, 21 Jan 2021 05:07:16 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5108 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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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

  1. (i)  the mean is an appropriate measure of central tendency.

  2. (ii)  the mean is not an appropriate measure of central tendency but the median is an appropriate measure of central tendency.

Question 3 & 4
Statistics | Quiz

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 5 & 6 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 3 & 4 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-4-question-3-4/ Thu, 21 Jan 2021 05:07:07 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5107 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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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 mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.

Question 1 & 2
Question 5 & 6

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 3 & 4 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 1 & 2 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-4-question-1-2/ Thu, 21 Jan 2021 05:05:07 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5102 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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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 a mathematics test given to 15 students, the following marks (out of 100) are recorded:

41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60

Find the mean, median and mode of this data.

Ex: 14.3 | Question 9
Question 3 & 4

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Class 9 | Chapter 14 | Statistics | Exercise 14.4 | Question 1 & 2 appeared first on Mathemafia.

]]> Measures of Central Tendency https://mathemafia.com/measures-of-central-tendency/ Thu, 21 Jan 2021 04:48:31 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5088 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…

The post Measures of Central Tendency appeared first on Mathemafia.

]]>

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Measures of Central Tendency appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Example 14 & 15 https://mathemafia.com/class-9-chapter-14-statistics-example-14-15/ Thu, 21 Jan 2021 04:40:04 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5061 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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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 unit of a factory where there are 5 employees : a supervisor and four labourers. The labourers draw a salary of Rs 5,000 per month each while the supervisor gets Rs 15,000 per month. Calculate the mean, median and mode of the salaries of this unit of the factory.

Example 12 & 13
Ex: 14.4 | Question 1

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Class 9 | Chapter 14 | Statistics | Example 14 & 15 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Example 12 & 13 https://mathemafia.com/class-9-chapter-14-statistics-example-12-13/ Thu, 21 Jan 2021 04:39:56 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5060 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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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 a series of matches are as follows:

17, 2, 7, 27, 15, 5, 14, 8, 10, 24, 48, 10, 8, 7, 18, 28

Find the median of the points scored by the team.

Example 10 & 11
Example 14 & 15

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Class 9 | Chapter 14 | Statistics | Example 12 & 13 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Example 10 & 11 https://mathemafia.com/class-9-chapter-14-statistics-example-10-11/ Thu, 21 Jan 2021 04:37:05 +0000 http://sh016.global.temp.domains/~mathemaf/?p=5049 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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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 devoted by them for social work.

Example 11: Find the mean of the marks obtained by 30 students of Class IX of a school, given in Example 2.

Example 9
Example 12 & 13

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 would require different methods to find this central value which can be used as the representation of the entire data set. For example, average number of students can be find using the mean of the data, splitting apples in large sized and small sized groups would require median and for a shoe company mode will be the best measure to decide about the investment.

So, following are three measures of central tendency that you must understand by watching the video embedded below. 

  • Mean
  • Median
  • Mode

Chapter 14 – Statistics

Mathemafia Logo - 75 px=>  Introduction to Statistics – Must watch tutorial  

​

Exercise 14.1

Question 1 & 2

Mathemafia Logo - 75 px=>  Bar Graph, Histogram, Frequency Polygon in Statistics  

Mathemafia Logo - 75 px=>  Measures of Central Tendency  

Examples

Example 1 & 2

Example 3 & 4

Example 5 & 6

Example 7

Example 8

Example 9

Example 10 & 11

Example 12 & 13

Example 14 & 15

Exercise 14.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Exercise 14.4

Question 1 & 2

Question 3 & 4

Question 5 & 6

Mathemafia Logo - 75 px=>  Statistics quiz – Class 9  

The post Class 9 | Chapter 14 | Statistics | Example 10 & 11 appeared first on Mathemafia.

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