Aeronautical researchers have developed three different processes to
pack a parachute. They want to
Which design is the most appropriate for this
compare the different processes in terms of time to
experiment?
deploy and reliability. There
are 1,200 objects that they
• Randomly number each item with 1, 2, or 3. Assign
can drop with a parachute from a plane. Using a table
of random digits, the researchers will randomly place
the items labeled 1 to the process 1 group, assign
the 1,200 items into three equally sized treatment
the items labeled 2 to the process 2 group, and
assign the items labeled 3 to the process 3 group.
groups suitable for comparison.
• Number each item from 1 to
1,200. Reading from
left to right from a table of random digits, identify 800
unique numbers from 1 to 1,200. Assign the items
with labels in the first 400 numbers to the process 1
group. Assign the items with labels in the second
400 numbers to the process 2 group. Assign the
remaining items to the process 3 group.
• Number each item from 0000 to
1199. Reading from
left to right on a random number table, identify 800
unique four-digit numbers from 0000 to 1199. Assign
the items with in labels in the first 400 numbers to the