Exam 9: Selecting the Sample

Members of the population that represent probability samples are those:

________ pertains to the basic level of investigation.

________ is used when different strata are apparent in the population and each stratum is randomly sampled.

________ is used when the researcher is working with a"skewed"population divided into portions and wishes to achieve high statistical efficiency.

Purposive samples,sometimes called judgment samples or exemplar samples,are highly subjective and,therefore,prone to much error.

There are at least two general reasons why a sample is almost always more desirable than a census,which include the expense and the difficulty of analyzing very large datasets.

Simple random sampling is an appealing sampling method simply because it embodies the requirements necessary to obtain a:

The greatest danger in cluster sampling is cluster specification error that occurs when the clusters are:

A stratified sample may require the calculation of ________ to achieve accuracy.

Sample frame,sample frame error,and sample error are basic concepts in sampling.Briefly define and describe each of these concepts.

There are different types of probability sampling methods.Which of the following is NOT one of those types?

In an email list sample,the master source list is the sample frame,so if the list company has been diligent,the email list sample will be a good representation of the population.

It is important to understand how the online sampling method in question works and to interpret the sampling procedure correctly with respect to basic sampling concepts

The random device method involves using an apparatus or a procedure to ensure that every member of the population has the same chance of being selected into the sample.

Describe the four probability sampling methods in which there is a known chance of a member of the population being selected into the sample.

Sample frame error in convenience sampling occurs in the form of members of the population who are infrequent users or nonusers of that location.

What type of sampling method is selection not based on chance or randomness but based on an inherently biased selection process?

A sample unit is a subset of the population that suitably represents that entire group.

A fine jeweler may require that the final sample is 75 percent female and 25 percent male because they understand that the customer base is primarily female with a smaller percentage of males.In this instance,a researcher would use which type of sampling method?

Managers tend to have a less specific definition of the population than do researchers because the researcher must use the description of the population precisely,whereas the manager uses it in a more general way.