$5\mathrm{.}65$ Software file updates. Software configuration management was used to monitor a software engineering team's performance at Motorola, Inc. $($Software Quality Professional, Nov. $2004).$ One of the variables of interest was the number of updates to a file changed because of a problem report. Summary statistics for $n=421$ files yielded the following results: $x^{-}=4\mathrm{.}71,s=6\mathrm{.}09,Q_L=1,$ and $Q_U=6.$ Are these data approximately normally distributed? Explain.