Question
The heights of 45 students measured to the nearest centimetre are given below :
$
\begin{array}{l}
155,166,159,161,158,154,153,159,157,152,160,157,158,170 \\
152,151,162,164,171,154,165,161,150,168,162,154,160,170,163,164 \\
165,169,165,155,157,158,160,161,156,153,150,165,167,169,172
\end{array}
$
Prepare a frequency table taking class intervals
$
150-155,155-160,160-165,165-170,170-175 .
$
$
\begin{array}{l}
155,166,159,161,158,154,153,159,157,152,160,157,158,170 \\
152,151,162,164,171,154,165,161,150,168,162,154,160,170,163,164 \\
165,169,165,155,157,158,160,161,156,153,150,165,167,169,172
\end{array}
$
Prepare a frequency table taking class intervals
$
150-155,155-160,160-165,165-170,170-175 .
$