Find the actual lower and upper-class limits and also the class m… - Vidyadip

Question

Find the actual lower and upper-class limits and also the class marks of the classes:$1.1 - 2.0, 2.1 -3.0$ and $3.1 - 4.0.$

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Answer

In the case of frequency $1.1 - 2.0$ the lower-class limit is $1.05,$ upper$-$class limit is $2.05$ and classmark.
is $1.05 - 2.05$
$\frac{1.05+2.05}{2}$
$=\frac{3.10}{2} $
$ =1.55$
In the case of frequency $2.1 - 3.0$ the lower$-$class limit is $2.05,$ upper$-$class limit is $3.05$ and classmark.
is $2.05 - 3.05$
$\frac{2.1+3.0}{2} $
$ =\frac{5.10}{2} $
$=2.55$
In the case of frequency $3.1 - 4.0$ the lower class limit is $3.05,$ the upper class limit is $4.05$ and classmark.
is $3.05 - 4.05$
$\frac{3.1+4.0}{2} $
$=\frac{7.10}{2}$
$=3.55$

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