Question

statistics
how do I solve it​

Answer 1

Step-by-step explanation:

class mark =

(lower class limit + upper class limit)/2

in 26-30,class mark =(26+30)/2

=56/2

=28

class size = difference between upper class limit and lower class limit

class boundaries means that if we find out adjustment factor,then how we write class interval.

eg-26-30

31-35

here,we subtract 31-30 to get adjustment factor,ie 1.Afterward we divide it by 2

1/2=0.5- it is the adjustment factor

now, new class interval are 26.5-30.5

30.5-35.5