Solution:
To calculate the estimated mean, we will use the formula below
[tex]mean=\frac{\sum_^fx}{\sum_^f}[/tex]
By substituting the values, we will have
[tex]\begin{gathered} mean=\frac{\sum^fx}{\sum^f}=\frac{(248\times1)+(567\times2)+(1402\times3)+(728\times4)+(419\times5)+(456\times6)+(203\times7)}{248+567+1402+728+419+456+203} \\ mean=\frac{14752}{4023} \\ mean=3.67 \\ mean=4 \end{gathered}[/tex]
Hence,
The final answer is approximately
[tex]\Rightarrow4\text{ }[/tex]
