Use cutpoint grouping with a first class of $40$ -under $46$.

Given data:

The frequency distribution is computed as,

$\begin{array}{|cc|}\hline \text{Cut-point grouping classes}& \text{Frequency}\\ 40-\text{under}46& 3\\ 46\text{-under}52& 6\\ \text{52-under}58& 10\\ 58-\text{under}64& 0\\ \text{64-under}70& 1\\ \text{Total}& 20\\ \hline\end{array}$

Given data:

The relative frequency is calculated as follows:
$\text{Relative Frequency}=\frac{\text{Frequency}}{\text{Numberofobservations}}$

$\begin{array}{|ccc|}\hline \text{Cut-point grouping classes}& \text{Frequency}& \text{Relative Frequency}\\ 40\text{-under}46& 3& \frac{3}{20}=0.15\\ \text{46-under}52& 6& \frac{6}{20}=0.3\\ \text{52-under}58& 10& \frac{10}{20}=0.5\\ \text{58-under64}& 0& \frac{0}{20}=0\\ \text{64-under}70& 1& \frac{1}{20}=0.05\\ \text{Total}& 20& 1\\ \hline\end{array}$

Given data:

MINITAB is used to generate the frequency histogram.

The following is the technique for obtaining a frequency histogram:

• Navigate to Graph>Histogram.
• Click OK after selecting Simple.
• Click OK after entering the matching column of DATA in Graph variables.

The output of MINITAB is displayed below.

Given data:

MINITAB is used to generate the relative frequency histogram.

The following is the technique for obtaining a frequency histogram:

• Navigate to Graph>Histogram.
• Click OK after selecting Simple.
• In the Graph variables section, enter the corresponding DATA column.
• Go to Vertical Axis and select TYPE TAB.
• Choose Percentage
• Click OK

The output of MINITAB is displayed below.