निम्न वितरण का माध्य विचलन माध्य के सापेक्ष ज्ञात कीजिए :
`{:("वर्ग - अंतराल ",0-8,8-16,16-24,24-32,32-40),("बारम्बारता "," "5," "9," "10," "8," "8):}`

Explanation

मान लीजिए , ` a = 20 , d_(i) = (x_(i)-20)/h ` जहाँ h = 8

समांतर माध्य , `barx = a +(sum f_(i)d_(i)xxh)/(sum f_(i)) `
` = 20 + (5xx 8)/40 = 21`
अब माध्य विचलन ` = (sum f_(i) |x_(i)-barx|)/(sum f_(i)) = (352)/40 = 8.8`.