A large union needs to gather information from their members. To save on expense

Question

A large union needs to gather information from their members. To save on expenses, they’ve been advised to collect the information from a simple random sample of 100 of their members. All members are listed in a union registry.


Which of the following is the best way for them to determine the sample of members to be contacted.

There are approximately 1100 members in the union. Sample every tenth name on the membership list. It’s not a problem that that there will be a few more names than needed.

Print each member’s name on equal sized cards. Place all the names in a box, mix them up a little, and contact the first 100 names drawn from the box.

Mail the survey to all members. Use the first 100 surveys that are returned.

Divide all members into ten geographical areas. To obtain a random sample, select ten names from each of these areas and contact these members for the survey.

Assign a randomly generated number from a uniform distribution to each member. Order all the members by the value of their random numbers and select the first hundred names from the reordered list.

There are approximately 1100 members in the union. Sample every tenth name on the membership list. It’s not a problem that that there will be a few more names than needed.

Print each member’s name on equal sized cards. Place all the names in a box, mix them up a little, and contact the first 100 names drawn from the box.

Mail the survey to all members. Use the first 100 surveys that are returned.

Divide all members into ten geographical areas. To obtain a random sample, select ten names from each of these areas and contact these members for the survey.

Assign a randomly generated number from a uniform distribution to each member. Order all the members by the value of their random numbers and select the first hundred names from the reordered list.

Explanation / Answer

To save expenses and time and get adequate results when we choose the below sampling method:

Assign a randomly generated number from a uniform distribution to each member. Order all the members by the value of their random numbers and select the first hundred names from the reordered list.

This is the best method for researcher requirements.

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