Question

what is the value of summation(xi - mean)​

Answer 1

Answer:

addition (or) sum of all the terms present under the xi column

follow me

jai kukke subramanya

Answer 2

Answer:

Finding xi in a data :

xi is defined as the class mark !!

To find xi perform these steps :

Find the upper limit of the class

Find the lower limit of the class

Add the two limits

Then divide the sum by two

You will get the class mark

Examples :

Number of students         Marks

10   -     20                            97

20   -     30                           96

30   -     40                            95

40   -      50                           94

Find the xi of class 30 - 40

xi = ( 30 + 40 ) / 2

  = 70 / 2

  = 35

Find the xi of class 10 - 20

xi = ( 10 + 20 ) / 2

   = 30 / 2

   = 15

Hope you understood :-)

And hope you felt like I am a deserving brainliest :)