Histograms

Jeff is the branch manager at a local bank. Recently, Jeffs been receiving customer feedback saying that the wait times for a client to be served by a customer service representative are too long. Jeff decides to observe and write down the time spent by each customer on waiting. Here are his findings from observing and writing down the wait times spent by 20 customers:

Respond to ALL of the questions on the attached Excel spreadsheet.

\begin{tabular}{|c|c|} \hline Customer Wait Time in Seconds (n=20) \\ \hline 43.1 & 42.2 \\ \hline 35.6 & 45.5 \\ \hline 37.6 & 30.3 \\ \hline 36.5 & 31.4 \\ \hline 45.3 & 35.6 \\ \hline 43.5 & 45.2 \\ \hline 40.3 & 54.1 \\ \hline 50.2 & 45.6 \\ \hline 47.3 & 36.5 \\ \hline 31.2 & 43.1 \\ \hline \end{tabular}