SOLUTION: Please walk me through this Listed below are the durations (in hours) of a simple random sample of all flights of a space shuttle program. Find the range, variance, and standar

Question 750182: Please walk me through this
Listed below are the durations (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?
77 100 240 191 163 263 195 371 254 231 384 336 223 250 0
The range of the sample data is [ ] hours
The variance of the sample data is [ ]
The standard deviation of the sample data is [ ] hours
Answer by CubeyThePenguin(3113) (Show Source): You can put this solution on YOUR website!
range = highest value - lowest value = 384 - 0 = 384 hr
variance
= (sum of squares of data values subtracted from the mean)/(number of data values - 1)
= 11108
standard deviation
= sqrt(variance)
= 105.4 hr
for reference: mean = (sum of all data values)/(number of data values) = 218.5 hr
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