Ex 3.1, 2 - Chapter 3 Class 7 Data Handling

Last updated at April 16, 2024 by

Ex 3.1, 2 - Organise the marks in a class assessment, in tabular form

Ex 3.1, 2 - Chapter 3 Class 7 Data Handling - Part 2
Ex 3.1, 2 - Chapter 3 Class 7 Data Handling - Part 3
Ex 3.1, 2 - Chapter 3 Class 7 Data Handling - Part 4
Ex 3.1, 2 - Chapter 3 Class 7 Data Handling - Part 5

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Transcript

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 − Lowest number = 9 − 1 = 8 (iv) Find the arithmetic mean Mean = (𝑆𝑢𝑚 𝑜𝑓 𝑜𝑏𝑠𝑒𝑟𝑣𝑎𝑡𝑖𝑜𝑛)/(𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑜𝑏𝑠𝑒𝑟𝑣𝑎𝑡𝑖𝑜𝑛) = (𝟏 + 𝟒 + 𝟑 + 𝟏𝟐 + 𝟐𝟓 + 𝟐𝟒 + 𝟏𝟒 + 𝟖 + 𝟗)/𝟐𝟎 = (𝟖 + 𝟏𝟐 + 𝟒𝟗 + 𝟏𝟒 + 𝟏𝟕)/𝟐𝟎 = 𝟏𝟎𝟎/𝟐𝟎 = 𝟏𝟎/𝟐 = 5 ∴ Mean = 5

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo