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 33
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 median will
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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