Answer
The frequency distribution is shown in the graph below.
Work Step by Step
Data range $12.3-6.2=6.1$
Bin width: $\frac{6.1}{7}=0.87\approx0.9$
Start bin value: $6.15$ to avoid any data fall on bin walls.
Number of bins: $7$
Count the frequency of data in each bin and plot the data as shown above.
