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. how many unique random numbers need to be selected from the table of random digits? 3 400 800 1,200

Explanation:

Step1: Understand the goal

We need to determine how many unique random numbers are needed to assign 1,200 items into three equally - sized treatment groups.

Step2: Analyze the assignment process

When we want to randomly assign each of the 1,200 items to a treatment group, we need a unique random number for each item. This is because each item needs to be identified and assigned a group based on its random number. For example, if we have a set of random numbers, we can sort them and then assign the first 400 (since \(1200\div3 = 400\)) to group 1, the next 400 to group 2, and the last 400 to group 3. But the key point is that each of the 1,200 items requires its own unique random number for the random assignment process.

Answer:

1,200 (the option: 1,200)