Question

Statistics question class 11 please solve asap​

Answer 1

Sorry but I m only in class 9th jab me 11th me ho jaugi tab pakka btaugi

Surely if I were in 11th I will surely✔ help u

Sorry dearest friend❤❤❤

Answer 2

Step-by-step explanation:

(1) Mean :

Mean = (Sum of all observations)/(Number of observations)

        = (1 + 2 + 3 + ... )/n

       = [n(n + 1)/2]/n

      = (n + 1)/2

(2) Variance :

(∑n²)/n - (∑n²/n)²

⇒ [n(n + 1)(2n + 1)/6n] - (n(n + 1)/2n)²

⇒ (n + 1)[(2n + 1)/6 - (n + 1)/4]

⇒ (n + 1)/12[4n + 2 - 3n - 3]

⇒ (n + 1)/12[(n - 1)]

⇒ (n - 1)²/12

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