Question

Mean in case of unequal class intervals using step deviation

Answer 1

o. of days 0-6 6-10 10-14 14-20 20-28 28-30 38- 40 No. of students 11 10 7 4 4 3 1

What will be the mean no. of days a student was absent? I am unable to understand since the class sizes are different.

Answer 2

use formula of step divisions half of class intervals s'pose interval 2-4,4-6so, interval 2/2=1