Exercise 2 Page 614

Recall all of the types of samples.

Random

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We are asked to complete the following sentence.

A sample for which each member of a population has an equal chance of being selected is a(n) ? sample.

Before we do that, let's recall all of the types of samples. We will start with samples that do not require dividing population into groups.

Type of Sample	Description
Self-Selected Sample	Members of a population volunteer to be in the sample.
Systematic Sample	Members of a population are selected according to a particular rule.
Convenience Sample	Members of a population who are easy to reach are selected.

Next, we have two types of samples in which we divide a population into groups.

Type of Sample	Division Into Groups	Sample
Stratified Sample	Each group contains people that share similar characteristics.	Members are randomly selected from each group.
Cluster Sample	Each group contains people randomly selected from a population.	Members in one or more of the groups — clusters — are selected.

Finally, the most preferred way of sampling is a random sample. In this sample each member of a population has an equal chance of being selected. Now, we are ready to complete our sentence.

A sample for which each member of a population has an equal chance of being selected is a(n) random sample.

Subchapter links

Communicate Your Answer p.609

Monitoring Progress p.611-613

Exercises p.614-616

Exercise 2 Page 614

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