Question

In a ______________ survey, areas to be investigated are chosen using a table of random numbers. A ______________ survey uses a grid of regularly spaced locations to select where to sample.

A) randomized, cluster
B) stratified, systematic
C) convenience, snowball
D) quota, judgment

Answer 1

In a randomized survey, random numbers are used to choose areas to investigate, whereas a systematic survey uses a fixed interval grid. The examples given illustrate cluster and systematic sampling techniques, which are important for valid data collection.

Step-by-step explanation:

The type of survey where areas to be investigated are chosen using a table of random numbers is a randomized survey. Conversely, a systematic survey uses a grid of regularly spaced locations to select where to sample. Therefore, the correct answer is:

• In a randomized survey, areas to be investigated are chosen using a table of random numbers.
• A systematic survey uses a grid of regularly spaced locations to select where to sample.

Considering the provided examples and definitions:

• The manager selecting four departments at random for interviews is using a cluster sampling design.
• Sampling different age groups of players for a soccer team represents stratified sampling.
• Interviewing human resource personnel in different companies can be an example of cluster sampling.
• Asking every tenth customer for a survey at a health club is an example of systematic sampling.

All these types of sampling are methods used to ensure the validity of the data gathered in a study and are important to understand when conducting research.