Tamilnadu State Board New Syllabus Samacheer Kalvi 8th Maths Guide Pdf Chapter 6 Statistics InText Questions Text Book Back Questions and Answers, Notes.

## Tamilnadu Samacheer Kalvi 8th Maths Solutions Chapter 6 Statistics InText Questions

Try These (Text Book page No. 212)

Question 1.

Arrange the given data in ascending and descending order: 9, 34, 4, 13, 42, 10, 25, 7, 31, 4, 40

Answer:

Ascending order: 4, 4, 7, 9, 10, 13, 25, 31, 34, 40, 42.

Descending order: 42, 40, 34, 31, 25, 13, 10, 9, 7, 4, 4

Question 2.

Find the_range of the given data: 53, 42,61, 9, 39, 63, 14, 20,06, 26, 31, 4, 57

Answer:

Ascending order of the given data:

4, 6, 9, 14, 20, 26, 31, 39, 42, 53, 57, 61, 63

Here largest value = 63

Smallest value = 4

∴ Range = Largest value – smallest value

= 63 – 4 = 59

Try These (Text Book page No. 217)

Question 1.

Prepare a frequency table for the data:

3, 4, 2, 4, 5, 6, 1, 3, 2, 1, 5, 3, 6, 2, 1, 3, 2, 4

Answer:

Ascending order of the given data.

1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6, 6

The distribution table:

Data | Tally marks | Frequency |

1 | ||| | 3 |

2 | |||| | 4 |

3 | |||| | 4 |

4 | ||| | 3 |

5 | || | 2 |

6 | || | 2 |

∴ Frequency Table:

Question 2.

Prepare a grouped frequency table for the data:

10, 9, 3, 29, 17, 34, 23, 20, 39, 42, 5, 12, 19, 47, 18, 19, 27, 7, 13, 40, 38, 24,34,15,40

Answer:

Largest value = 47

Smallest value = 3

Range = Largest value – Smallest value

= 47 – 3 = 44

Suppose we take class size as 10, then Number of class intervals possible

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