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Sampling Technique

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To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is able to break free from the cuffs. What type of sampling technique does this represent? Explain your reasoning.

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Solution Summary

This solution describes four common types of sampling techniques, and then identifies the specific type of sampling technique used in the presented scenario and explains the reasoning for this choice.

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Please see response attached, which is also presented below. I hope this helps and take care.

RESPONSE:

1. To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is able to break free from the cuffs. What type of sampling technique does this represent? Explain your reasoning.

There are different ways to draw a sample group; some better than others, and the above sampling technique represents purposeful sampling.

Let's look at the four common ways are to understand why it represents purposeful sampling and not the other three types of sampling:

(1) Random sampling. This is generally considered the best sampling approach because it requires that everyone be considered for selection ? names or numbers are drawn without preference. You assign random numbers to each member of the population (teachers, students, schools, etc.) and select the sample using a table of random numbers or draw from the hat until you have the total needed for your sample group. The downside of random selection is that it is random; your resulting sample group may not adequately represent the entire population. ...

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