Question

Please solve it for me!!
Question number 10.​

Answer 1

Refer the attachment for Answer !

Step 1 :- We found xi by using this formulae xi = Upper limit + lower limit / 2

Step 2 :- Using assuming method we further reduced the number so that our calculations becomes easy. formula :- di = xi - a

Step 3 :- Multiply the value of fi and di.

Step 4 :- Find the sum of fi and fidi.

Step 5 :- Using Mean formula we get the mean.

Answer 2

Answer:

PLS REFER TO THE ATTACHMENT :)!!

Mean can be done in short-cut formula,step-deviation and simple , direct formula too.

HOPE THIS HELPS..