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Listed below are the duration (in hours) of a simple random sample of all flights of...

Listed below are the duration (in hours) of a simple random sample of all flights of a space shuttle program. Find the​ range, variance, and standard deviation for the sample data. Is the lowest duration time​ unusual? Why or why​ not?

80   95   238   198   170   270   196   375   260   233   384   330   220   240   0

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