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Chapter 3 Class 7 Data Handling

Concept wise

Last updated at May 29, 2023 by Teachoo

Ex 3.1, 2 Organise the following marks in a class assessment, in a tabular form. 4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7 Here, we write numbers in tabular form (i) Which number is the highest? (ii) Which number is the lowest? Height number = 9 Lowest number = 1 (iii) What is the range of the data? Range = Highest number β Lowest number = 9 β 1 = 8 (iv) Find the arithmetic mean Mean = (ππ’π ππ πππ πππ£ππ‘πππ)/(ππ’ππππ ππ πππ πππ£ππ‘πππ) = (π + π + π + ππ + ππ + ππ + ππ + π + π)/ππ = (π + ππ + ππ + ππ + ππ)/ππ = πππ/ππ = ππ/π = 5 β΄ Mean = 5