Question

which value should be taken as a in statistics​

Answer 1

Answer:

the middlemost value in classmark is taken as a.

Step-by-step explanation:

for example ,

classsize               classmark

10 - 20                         15

20 -30                         25

30 - 40                        35      ------------- case 1

40 - 50                         45

50 - 60                       55

---------------------------------------

[ 60 - 70 ]                     65       ------------- case 2

here, i will take 35 as a . if the number of classmarks is even , you can take the approximate  middle value that is in case 2 there are 6 classmarks . so you can take either  35 or 45 as a.