Example 7 - Chapter 14 Class 10 Statistics (Important Question)

Last updated at April 16, 2024 by

Example 7 - A survey regarding heights of 51 girls of Class X

Example 7 - Chapter 14 Class 10 Statistics - Part 2
Example 7 - Chapter 14 Class 10 Statistics - Part 3
Example 7 - Chapter 14 Class 10 Statistics - Part 4

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Transcript

Example 7 A survey regarding the heights (in cm) of 51 girls of Class X of a school was conducted and the following data was obtained Find the median height. Making Normal Table Median = l + (𝑵/𝟐 −𝒄𝒇)/𝒇 × h Here, 𝑵/𝟐 ∴ 145 – 150 is the Median class And, l = lower limit of median class h = class-interval cf = cumulative frequency of the class before median class f = frequency of the median class Putting values in Formula Median = l + (𝑛/2 −𝑐𝑓)/𝑓 × h = 145 + (𝟐𝟓.𝟓 −𝟏𝟏)/𝟏𝟖 × 5 = 145 + 14.5/11 × 5 = 145 + 4.03 = 149.03 Therefore, Median height is 149.03 cm

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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