Question

Aeronautical researchers have developed three different processes to pack a parachute. They want to compare the different processes in terms of time to deploy and reliability. There are 1,200 objects that they can drop with a parachute from a plane. Using a table of random digits, the researchers will randomly place the 1,200 items into three equally sized treatment groups suitable for comparison.
Which design is the most appropriate for this experiment?

Randomly number each item with 1, 2, or 3. Assign the items labeled 1 to the process 1 group, assign the items labeled 2 to the process 2 group, and assign the items labeled 3 to the process 3 group.
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 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.
Select an item, and identify the first digit reading from left to right on a random number table. If the first digit is a 1, 2, or 3, assign the item to the process 1 group. If the first digit is a 4, 5, or 6, assign the item to the process 2 group. If the first digit is a 7, 8, or 9, assign the item to the process 3 group. If the first digit is a 0, skip that digit and move to the next one to assign the item to a group. Repeat this process for each item.

Answer 1

The best design for this experiment is to number the items from 1 to 1,200 and then choose random numbers in the table of random digits (second option).

How to use a table of random digits?

These tables are used to randomly assign items or subjects into groups when experimenting. The best way to use these tables are:

• Give each item or participant a number.
• Take a lot at the table and choose a number.
• If this number is the same that the number assigned to an item or participant classify it in the first group.
• Keep selecting.

Based on this, for this experiment the steps are:

• Number the items from 1 to 1,200.
• Identify numvers in the table.
• Assign the first 400 items to the process 1 group.
• Repeat the process for the other two groups.

Learn more about experiments in: brainly.com/question/11256472

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