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 that was changed because of a problem report. Summary statistics for n = 421 files yielded the following results:  = 4.71, s = 6.09, QL = 1, and QU = 6. Are these data approximately normally distributed? Explain.