Answer :
For given n numbers of data points
[tex]x_1,x_2,x_3,\ldots,x_n[/tex]The mean value is the sum of all the data points divided by the total number of data points n.
It is formulated as
[tex]\bar{x}=\frac{x_1+x_2+\cdots+x_n}{n}[/tex]Given data points are
34 36 32 40 39 17
Here n=6.
Therefore, the mean of hours they worked that week is
[tex]\begin{gathered} \bar{x}=\frac{34+36+32+40+39+17}{6} \\ =33 \end{gathered}[/tex]Hence, the mean of hours they worked that week is 33 hours.