Chapter 4.1, Problem 3.1CYU

(a)

To determine

To analyse: The telephone directory involves sampling or non-sampling error.

Answer to Problem 3.1CYU

The telephone directory is labelled as sampling error.

Explanation of Solution

Given information:

The telephone directory is used as a sampling frame.

Sampling error is the error caused by observing a sample instead of the whole population.

Sampling error is any difference that exists between a statistic and its corresponding parameter. In other words, it is a statistical error occurs when the sample does not represent the entire population.

(a)

The telephone directory is used as a sampling frame:

The whole telephone directory is chosen as sampling frame. This is an example of sampling error because it is related to how the sample is being chosen.

Conclusion:

This is an example of sampling error because it is related to how the sample is being chosen.

(b)

To determine

To analyse: The person cannot be contacted in five calls comes under sampling or non-sampling error.

Answer to Problem 3.1CYU

The person cannot be contacted in five calls is labelled under non-sampling error.

Explanation of Solution

Given information:

The person cannot be contacted in five calls.

The person cannot be contacted in five calls:

This is an example of non-sampling error because it is related to the collection of data and has nothing to do with the design of the survey.

Conclusion:

It is related to the collection of data and has nothing to do with the design of the survey.

(c)

To determine

To analyse: The Interviewers choose people walking by on the sidewalk to interview comes under sampling or non-sampling error.

Answer to Problem 3.1CYU

The Interviewers choose people walking by on the sidewalk to interview is labelled under sampling error.

Explanation of Solution

Given information:

Interviewers choose people walking by on the sidewalk to interview.

Interviewers choose people walking by on the sidewalk to interview:

This is an example of sampling error because it is related to how the sample is being conducted. Here, the sample is people on the street not a selected few people.

Conclusion:

The sample is people on the street not a selected few people.