An article in Computers & Electrical Engineering $["$Parallel Simulation of Cellular Neural

Networks" $(1996,$ Vol. $22,$ pp$.61-84)]$ considered the speedup of cellular neural networks

$(CNN)$ for a parallel general$-$purpose computing architecture based on six transputers in

different areas. The data follow:

$4\mathrm{.}600101$

$($a$)$ Is there evidence to support the assumption that speedup of $CNN$ is normally distributed?

Include a graphical display in your answer. $[5$ points$]$

$($b$)$ Construct a $95\%$ two$-$sided confidence interval on the mean speedup. $[5$ points$]$

$($c$)$ Construct a $95\%$ lower confidence bound on the mean speedup. $[5$ points$]$