Two Graphical Displays Are Given for a Set of Data $\begin{array} { l | l } 2 & 4 \\ 3 & \\ 4 & 2 \\ 5 & 25 \\ 6 & 057 \\ 7 & 12579 \end{array}$

Two graphical displays are given for a set of data. A hypothesis test is to be performed for the mean of the populationfrom which the data were obtained. Would it be reasonable to use a one-mean z-test? Explain your reasoning. Assumethat the population standard deviation is known.
-A normal probability plot and a stem-and-leaf diagram of the data are given below. $\begin{array} { l | l } 2 & 4 \\ 3 & \\ 4 & 2 \\ 5 & 25 \\ 6 & 057 \\ 7 & 12579 \end{array}$