A sample of 26 offshore oil workers took part in a simulatedescape exercise, resulting in the accompanying dataon time (sec) to complete the escape (“OxygenConsumption and Ventilation During Escape from anOffshore Platform,” Ergonomics, 1997: 281–292):389 356 359 363 375 424 325 394 402373 373 370 364 366 364 325 339 393392 369 374 359 356 403 334 397a. Construct a stem-and-leaf display of the data. Howdoes it suggest that the sample mean and median willcompare? b. Calculate the values of the sample mean and median.[Hint: oxi 5 9638.]c. By how much could the largest time, currently 424,be increased without affecting the value of the samplemedian? By how much could this value bedecreased without affecting the value of the samplemedian?d. What are the values of x and x , when the observationsare reexpressed in minutes?
A sample of 26 offshore oil workers took part in a simulated
escape exercise, resulting in the accompanying data
on time (sec) to complete the escape (“Oxygen
Consumption and Ventilation During Escape from an
Offshore Platform,” Ergonomics, 1997: 281–292):
389 356 359 363 375 424 325 394 402
373 373 370 364 366 364 325 339 393
392 369 374 359 356 403 334 397
a. Construct a stem-and-leaf display of the data. How
does it suggest that the sample mean and
compare?
b. Calculate the values of the sample mean and median.
[Hint: oxi 5 9638.]
c. By how much could the largest time, currently 424,
be increased without affecting the value of the sample
median? By how much could this value be
decreased without affecting the value of the sample
median?
d. What are the values of x and x , when the observations
are reexpressed in minutes?
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