Class 9 | Chapter 14 | Statistics | Exercise 14.2 | Question 8

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?

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

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