Ex 13.1, 9 - Chapter 13 Class 10 Statistics

Transcript

Ex 13.1, 9 The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate. Mean(𝑥 ̅) = a + h × (∑▒𝒇𝒊𝒖𝒊)/(∑▒𝒇𝒊) Where a = Assumed mean h = Class interval Also, ∑▒𝒇𝒊 = 35 ∑▒𝒇𝒊𝒖𝒊 = −2 Putting values in formula Mean(𝒙 ̅) = a + h × (∑▒𝒇𝒊𝒖𝒊)/(∑▒𝒇𝒊) 𝑥 ̅ = 70 + 10 × (−2)/35 𝑥 ̅ = 70 − 0.57 𝒙 ̅ = 69.43 Thus, Mean Literacy Rate is 69.43%