We have given,Also,Putting this in above equationNow, given …[1]using thisWe have, …[2]We know,If x1, x2, … , xn are observations with frequencies f1, f2, … , fn i.e. x1 occurs f1 times and x2 occurs f2 times and so on, then mean() of observations is given byFrom [1] and [2]

Q. 344.3( 9 Votes )

If <span lang="EN

Class 10th RD Sharma - Mathematics 7. Statistics

Answer :

We have given,

Also,

Putting this in above equation

Now, given …[1]

using this

We have,

…[2]

We know,

If x₁, x₂, … , x_n are observations with frequencies f₁, f₂, … , f_n i.e. x₁ occurs f₁ times and x₂ occurs f₂ times and so on, then mean() of observations is given by