continuous class intervals Archives – Mathemafia http://sh016.global.temp.domains/~mathemaf/tag/continuous-class-intervals/ Mathematics is like music - Enjoy it!!! Sun, 17 Jan 2021 16:14:36 +0000 en-US hourly 1 https://wordpress.org/?v=7.1.2 https://mathemafia.com/wp-content/uploads/2020/08/cropped-M__Logo__SM-1-32x32.png continuous class intervals Archives – Mathemafia http://sh016.global.temp.domains/~mathemaf/tag/continuous-class-intervals/ 32 32 Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 9 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-9/ Mon, 04 Jan 2021 13:14:07 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4738 Question 9: A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows: 2.6 3.5 2.5 3.5 4.6 3.0 3.7 2.3 3.2 4.4 3.4 3.2 3.9 3.8 3.2 3.2 2.2…

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Question 9: A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows:

2.6 3.5 2.5 3.5 4.6 3.0 3.7 2.3 3.2 4.4 3.4 3.2 3.9 3.8 3.2 3.2 2.2 3.4 3.8 3.3 2.9 3.2 3.2 2.6 3.5 4.1 3.5 4.5 3.2 4.6 3.7 3.0 4.3 2.8 3.1 3.7 3.4 4.2 2.9 3.6

Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the interval 2 – 2.5.

Question 8
Ex: 14.3 | Question 1

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 9 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 8 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-8/ Mon, 04 Jan 2021 13:14:03 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4737 Question 8: Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2…

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Question 8: Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows:

1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12

  1. Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 – 10.

  2. How many children watched television for 15 or more hours a week?

Question 7
Question 9

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 8 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 7 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-7/ Mon, 04 Jan 2021 13:13:58 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4736 Question 7: The value of π upto 50 decimal places is given below: 3.14159265358979323846264338327950288419716939937510 Make a frequency distribution of the digits from 0 to 9 after the decimal point. What are the most and the least frequently occurring digits? Question…

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Question 7: The value of π upto 50 decimal places is given below:

3.14159265358979323846264338327950288419716939937510

  1. Make a frequency distribution of the digits from 0 to 9 after the decimal point.

  2. What are the most and the least frequently occurring digits?

Question 6
Question 8

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 7 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 6 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-6/ Mon, 04 Jan 2021 13:13:54 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4735 Question 6: Three coins were tossed 30 times simultaneously. Each time the number of heads occurring was noted down as follows: 0 1 2 2 1 2 3 1 3 0 1 3 1 1 2 2 0 1 2…

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Question 6: Three coins were tossed 30 times simultaneously. Each time the number of heads occurring was noted down as follows:

0 1 2 2 1 2 3 1 3 0 1 3 1 1 2 2 0 1 2 1 3 0 0 1 1 2 3 2 2 0

Prepare a frequency distribution table for the data given above.

Question 5
Question 7

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 5 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-5/ Mon, 04 Jan 2021 13:13:49 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4734 Question 5: A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows: 0.03 0.08 0.08 0.16 0.05…

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Question 5: A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows:

0.03 0.08 0.08 0.16 0.05 0.02 0.11 0.08 0.12 0.08 0.01 0.10 0.11 0.07 0.05

0.09 0.04 0.17 0.06 0.18 0.20 0.13 0.22 0.07 0.06 0.09 0.18 0.07 0.01 0.04

  1. Make a grouped frequency distribution table for this data with class intervals as 0.00 – 0.04, 0.04 – 0.08, and so on.

  2. (ii)  For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million?

Question 4
Question 6

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 5 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 4 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-4/ Mon, 04 Jan 2021 13:13:44 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4733 Question 4: The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: 161  150 154 162  164 171 153  159 161 154  152 153 161 159 162 165 168 165 158 170 162…

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Question 4: The heights of 50 students, measured to the nearest centimetres, have been found to be as follows:

161  150 154 162  164 171 153  159 161 154  152 153 161 159 162 165 168 165 158 170 162 156 158 167 168 161 154 162 154 156 172 165 166 168 162 160 161 159 158 153 150 151 160 170 165 164 173 166 154 159

  1. Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 – 165, 165 – 170, etc.
  2. What can you conclude about their heights from the table?
Question 3
Question 5

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 4 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 3 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-3/ Mon, 04 Jan 2021 13:13:38 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4732 Question 3: The relative humidity (in %) of a certain city for a month of 30 days was as follows: 98.1 98.6 89.2 92.3 96.2 92.1 99.2 90.3 97.1 93.5 84.9 90.2 86.5 95.3 92.9 96.3 92.7 95.1 97.2 93.3…

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Question 3: The relative humidity (in %) of a certain city for a month of 30 days was as follows:

98.1 98.6 89.2 92.3 96.2 92.1 99.2 90.3 97.1 93.5 84.9 90.2 86.5 95.3 92.9 96.3 92.7 95.1 97.2 93.3 95.7 98.3 97.3 96.1 94.2 95.1 95.2 97.3 92.1 89

(i) Construct a grouped frequency distribution table with classes 84 – 86, 86 – 88, etc.

(ii) Which month or season do you think this data is about?

(iii) What is the range of this data?

Question 2
Question 4

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 3 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 2 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-2/ Mon, 04 Jan 2021 13:13:34 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4731 Question 2: The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16…

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Question 2: The distance (in km) of 40 engineers from their residence to their place of work were found as follows:

5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12

Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?

Question 1
Question 3

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 2 appeared first on Mathemafia.

]]> Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 1 https://mathemafia.com/class-9-chapter-14-statistics-exercise-14-2-question-1/ Mon, 04 Jan 2021 13:11:17 +0000 http://sh016.global.temp.domains/~mathemaf/?p=4726 Question 1: The blood groups of 30 students of Class VIII are recorded as follows: A,B,O,O,AB,O,A,O,B,A,O,B,A,O,O, A,AB,O,A,A,O,O,AB,B,A,O,B,A,B,O. Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group…

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Question 1: The blood groups of 30 students of Class VIII are recorded as follows: A,B,O,O,AB,O,A,O,B,A,O,B,A,O,O, A,AB,O,A,A,O,O,AB,B,A,O,B,A,B,O.

Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?

Ex: 14.1 | Question 1 & 2
Question 2

Statistics

This tutorial is recommended for the beginners to watch to understand the following:

  • What is statistics
  • Data
  • Information
  • Frequency distribution table
    • Ungrouped
    • Grouped
  • Class Intervals 
    • Overlapping
    • Non-overlapping
  • Class limits 
    • Upper class limit
    • Lower class limit

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 14.2 | Question 1 appeared first on Mathemafia.

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