


Maths Crash Course - Live lectures + all videos + Real time Doubt solving!
Examples
Example 2 Deleted for CBSE Board 2023 Exams
Example 3 Important Deleted for CBSE Board 2023 Exams
Example 4 Important
Example 5
Example 6
Example 7 Important You are here
Example 8 Important
Example 9
Example 10 Deleted for CBSE Board 2023 Exams
Example 11 Important Deleted for CBSE Board 2023 Exams
Example 12 Deleted for CBSE Board 2023 Exams
Example 13 Deleted for CBSE Board 2023 Exams
Example 14 Important Deleted for CBSE Board 2023 Exams
Example 15 Important Deleted for CBSE Board 2023 Exams
Last updated at May 29, 2018 by Teachoo
Maths Crash Course - Live lectures + all videos + Real time Doubt solving!
Example 7 A teacher wanted to analyze the performance of two sections of students in a mathematics test of 100 marks. Looking at their performances, she found that a few students got under 20 marks and a few got 70 marks or above. So she decided to group them into intervals of varying sizes as follows: 0 - 20, 20 - 30, . . ., 60 - 70, 70 - 100. Then she formed the following table: Make histogram of the data The data has class intervals of varying width. So, we calculate adjusted frequency Adjusted frequency = (𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 × 𝑅𝑒𝑞𝑢𝑖𝑟𝑒𝑑 𝑠𝑖𝑧𝑒 𝑜𝑓 𝑖𝑛𝑡𝑒𝑟𝑣𝑎𝑙)/(𝐶𝑢𝑟𝑟𝑒𝑛𝑡 𝑠𝑖𝑧𝑒 𝑜𝑓 𝑖𝑛𝑡𝑒𝑟𝑣𝑎𝑙)