Question

if the class mark of a frequency distribution are 29.5,36.5,43.5,50.5 then find the class interval corresponding to class mark 36.5

Answer 1

class size of the frequency distribution=36.5-29.5=7 and half of class size=7/2=3.5

therefore the class interval corresponding to 36.5 would be

36.5+3.5=40

36.5-3.5=33

i.e.33-40 are the class intervals