Question

If l is the lower class limit of a class in a frequency distribution and m is the mid-point of the class, then the upper class limit of the class interval is ________.

Answer 1

Mid-value of the class interval = m

Lower class limit of the class interval = l

We know

Mid-value of the class interval = $\frac{1}{2}$(Lower class limit + Upper class limit)

∴ m = $\frac{1}{2}$(l + Upper class limit)

⇒ l + Upper class limit = 2m

⇒ Upper class limit = 2m − l

Thus, the upper class limit of the class interval is 2m − l.

If l is the lower class limit of a class in a frequency distribution and m is the mid-point of the class, then the upper class limit of the class interval is ___2m − l___.