Given,
The value of N is 7.
The mean of the data is 13.
Required
The value of sum of the data.
The mean is calculated as,
[tex]\begin{gathered} Mean=\frac{\sum_x}{N} \\ 13=\frac{\sum_x}{7} \\ \sum_x=13\times7 \\ \sum_x=91 \end{gathered}[/tex]
Hence, the value of sum of data is 91.
