Consider the Following Observations on Shear Strength of a Joint $$\begin{array} { l l l l l l l l l l l } 30.0 & 4.4 & 33.1 & 66.7 & 81.5 & 22.2 & 40.4 & 16.4 & 73.7 & 36.6 & 109.9\end{array}$$

Essay

Consider the following observations on shear strength of a joint bonded in a particular manner: $$\begin{array} { l l l l l l l l l l l } 30.0 & 4.4 & 33.1 & 66.7 & 81.5 & 22.2 & 40.4 & 16.4 & 73.7 & 36.6 & 109.9\end{array}$$
a. Determine the value of the sample mean.
b. Determine the value of the sample median. Why is it so different from the mean?
c. Calculate a trimmed mean by deleting the smallest and largest observations. What is the corresponding trimming percentage? How does the value of this
compare to the mean and median?