Use limit grouping with the first class of $0-4$ and a class width of $5$.

Given data:

The frequency distribution is calculated as,

$\begin{array}{|cc|}\hline \text{Limit grouping classes}& \text{Frequency}\\ 0-4& 5\\ 5-9& 5\\ 10-14& 1\\ 15-19& 4\\ 20-24& 2\\ 25-29& 3\\ \text{Total}& 20\\ \hline\end{array}$

Given data:

The relative frequency is calculated as follows:

$\text{Relative Frequency}=\frac{\text{Frequency}}{\text{Numberofobservations}}$

$\begin{array}{|ccc|}\hline \text{Limit grouping classes}& \text{Frequency}& \text{Relative Frequency}\\ 0-4& 5& \frac{5}{20}=0.25\\ 5-9& 5& \frac{5}{20}=0.25\\ 10-14& 1& \frac{1}{20}=0.01\\ 15-19& 4& \frac{4}{20}=0.20\\ 20-24& 2& \frac{2}{20}=0.1\\ 25-29& 3& \frac{3}{20}=0.15\\ \text{Total}& 20& \\ \hline\end{array}$

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.