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Exercises in Chapter 3 data handling Grade 7

Questions in Exercise 3.1

The following table shows the points of each player scored in four games:

Player | Game 1 | Game 2 | Game 3 | Game 4 |
---|---|---|---|---|

A | 14 | 16 | 10 | 10 |

B | 0 | 8 | 6 | 4 |

C | 8 | 11 | Did not play | 13 |

What is the mean to determine A’s average number of points scored per game?

**Following table shows the points of each player scored in four games:**

Player | Game 1 | Game 2 | Game 3 | Game 4 |
---|---|---|---|---|

A | 14 | 16 | 10 | 10 |

B | 0 | 8 | 6 | 4 |

C | 8 | 11 | Did not play | 13 |

**Who is the best performer?**

Following table shows the points of each player scored in four games:

Player | Game 1 | Game 2 | Game 3 | Game 4 |
---|---|---|---|---|

A | 14 | 16 | 10 | 10 |

B | 0 | 8 | 6 | 4 |

C | 8 | 11 | Did not play | 13 |

B played in all four games. What is the mean of his score?

The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:

Day | Rainfall (in mm) |
---|---|

Mon | 0.0 |

Tue | 12.2 |

Wed | 2.1 |

Thurs | 0.0 |

Fri | 20.5 |

Sat | 5.5 |

Sun | 1.0 |

On how many days was the rainfall less than the mean rainfall?

The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:

Day | Rainfall (in mm) |
---|---|

Mon | 0.0 |

Tue | 12.2 |

Wed | 2.1 |

Thurs | 0.0 |

Fri | 20.5 |

Sat | 5.5 |

Sun | 1.0 |

What is the range of rainfall in the above data?

The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:

Day | Rainfall (in mm) |
---|---|

Mon | 0.0 |

Tue | 12.2 |

Wed | 2.1 |

Thurs | 0.0 |

Fri | 20.5 |

Sat | 5.5 |

Sun | 1.0 |

What is the mean rainfall for the week?

Questions in Exercise 3.2

Questions in Exercise 3.3

**Number of children in six different classes are given below.**

Class | Number of Children |
---|---|

Fifth | 135 |

Sixth | 120 |

Seventh | 95 |

Eighth | 100 |

Ninth | 90 |

Tenth | 80 |

**How would you choose a scale?**

**The performance of a student in 1st Term and 2nd Term is given:**

Subject | English | Hindi | Maths | Science | S. Science |
---|---|---|---|---|---|

**1<sup>st</sup>** **Term (M.M. 100)** | 67 | 72 | 88 | 81 | 73 |

**2<sup>nd</sup>** **Term (M.M. 100)** | 70 | 65 | 95 | 85 | 75 |

**Has the performance gone down in any subject?**

**Number of children in six different classes are given below.**

Class | Number of Children |
---|---|

Fifth | 135 |

Sixth | 120 |

Seventh | 95 |

Eighth | 100 |

Ninth | 90 |

Tenth | 80 |

**Which class has the maximum number of children?**

**Number of children in six different classes are given below.**

Class | Number of Children |
---|---|

Fifth | 135 |

Sixth | 120 |

Seventh | 95 |

Eighth | 100 |

Ninth | 90 |

Tenth | 80 |

**Which class has the minimum number of children?**

**The performance of a student in 1st Term and 2nd Term is given:**

Subject | English | Hindi | Maths | Science | S. Science |
---|---|---|---|---|---|

**1<sup>st</sup>** **Term (M.M. 100)** | 67 | 72 | 88 | 81 | 73 |

**2<sup>nd</sup>** **Term (M.M. 100)** | 70 | 65 | 95 | 85 | 75 |

**In which subject is the improvement the least?**

**The performance of a student in 1st Term and 2nd Term is given:**

Subject | English | Hindi | Maths | Science | S. Science |
---|---|---|---|---|---|

**1<sup>st</sup>** **Term (M.M. 100)** | 67 | 72 | 88 | 81 | 73 |

**2<sup>nd</sup>** **Term (M.M. 100)** | 70 | 65 | 95 | 85 | 75 |

**In which subject, has the child improved his performance the most?**

Number of children in six different classes are given below.

Class | Number of Children |
---|---|

Fifth | 135 |

Sixth | 120 |

Seventh | 95 |

Eighth | 100 |

Ninth | 90 |

Tenth | 80 |

Find the ratio of students of class sixth to the students of class eight and select correct option

Consider this data collected from a survey of a colony.

Favourite Sport | Cricket | Basket Ball | Swimming | Hockey | Athletics |
---|---|---|---|---|---|

**Watching** | 1240 | 470 | 510 | 430 | 250 |

**Participating** | 620 | 320 | 320 | 250 | 105 |

Which is the least liked sports by people?

**Consider this data collected from a survey of a colony.**

Favourite Sport | Cricket | Basket Ball | Swimming | Hockey | Athletics |
---|---|---|---|---|---|

**Watching** | 1240 | 470 | 510 | 430 | 250 |

**Participating** | 620 | 320 | 320 | 250 | 105 |

**Which is more preferred, watching or participating in sports?**

Consider this data collected from a survey of a colony.

Favourite Sport | Cricket | Basket Ball | Swimming | Hockey | Athletics |
---|---|---|---|---|---|

**Watching** | 1240 | 470 | 510 | 430 | 250 |

**Participating** | 620 | 320 | 320 | 250 | 105 |

Which sport is most popular in terms of participation?

Consider this data collected from a survey of a colony.

Favourite Sport | Cricket | Basket Ball | Swimming | Hockey | Athletics |
---|---|---|---|---|---|

**Watching** | 1240 | 470 | 510 | 430 | 250 |

**Participating** | 620 | 320 | 320 | 250 | 105 |

Which is the most popular sport?

Questions in Exercise 3.4

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