In a frequency distribution, the mid value of a class is 15 and the class interval is 4. The lower limit of the class is
Mid value = 
15 = 
30 = (x + x -4)
34 = 2x
x = 17
Lower class limit = 17 -4 = 13
5
In a frequency distribution, the mid value of a class is 15 and the class interval is 4. The lower limit of the class is
Mid value =
15 =
30 = (x + x -4)
34 = 2x
x = 17
Lower class limit = 17 -4 = 13