30 Questions
What is the main purpose of using a table of random numbers or a lottery system in simple random sampling?
To ensure that each unit in the sampling frame has an equal chance of being selected
When is systematic random sampling most appropriate to use?
When the population is homogeneous and there is no suspicion of a trend or pattern in the frame or geographical layout
What is the formula for determining the sampling interval, $k$, in systematic random sampling?
$k = \frac{\text{population size}}{\text{sample size}}$
What is the range of possible values for the random start, $rs$, in systematic random sampling?
$1 \leq rs \leq k$
Which of the following is a disadvantage of simple random sampling?
Both (b) and (c)
What is the main purpose of arranging the target population in a specific order before applying systematic random sampling?
To account for any trends or patterns in the population
What is the main goal of quota sampling?
To reflect the proportions of the population in different categories
What is the primary disadvantage of quota sampling?
The sample may not be representative of the population
Which type of non-probability sampling is useful when a population is hidden or difficult to access?
Snowball sampling
What is the main disadvantage of snowball sampling?
The sample may not be representative of the population
Which type of data is gathered directly from the informants of the study?
Primary data
Which data collection procedure involves interaction between the interviewer and the respondent?
Interview
What type of sampling involves two or more levels of units embedded one in the other?
Multi-stage random sampling
Which of the following is a key characteristic of a questionnaire?
There is interaction between the facilitator and respondent about the subject matter
Which type of sampling involves the selection of elements based on assumptions regarding the population of interest?
Non-probability sampling
What is the main purpose of experimentation in data collection?
To understand cause-and-effect relationships
How does observation differ from experimentation in data collection?
Observation studies are not controlled, unlike experiments
In which type of sampling is the sample drawn from the part of the population that is readily available and convenient?
Convenience sampling
What is the main advantage of convenience sampling?
Good response rate
Which of the following is considered unethical behavior in statistical practice?
Developing misleading graphs and using inappropriate summary statistics
Why is convenience sampling not suitable for generalizing findings?
Cannot move beyond describing the sample
What is the key difference between a questionnaire and an observational study?
Questionnaires are used for experimental studies, while observational studies are used for behavioral and attitudinal studies
Which of the following is a key characteristic of ethical statistical practice?
Being fair, thorough, objective, and neutral in data collection and reporting
What is the main reason for sampling according to the passage?
To determine truths about the population with known accuracy
Which of the following is NOT a factor that influences the representativeness of a sample?
Demographic characteristics of the population
Which type of sampling is described as minimizing or eliminating selection bias?
Probability sampling
When is sampling the entire population recommended according to the passage?
When the population is very small
In the provided example, why would interviewing people at a shopping center early in the morning using convenience sampling not represent the views of other members of society?
Limited to those present at the specific time and location
What characteristic of the population is mentioned as important for simple random sampling to be applicable?
The population should be homogeneous and readily available
What is the primary purpose of a sampling frame according to the passage?
To draw potential respondents from
Learn about sampling techniques and data collection at University of St. La Salle. Understand the importance of sampling, resources needed, and how to calculate accuracy in sampling.
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