Basic Concepts
Types of Sampling
Sample Size Determination
Advantages and Disadvantages
Real-World Applications
200

 What is a sample?

A subset of individuals chosen from a larger population for the purpose of statistical analysis.

200

Name a type of probability sampling.

Simple random sampling.

200

Why is determining the correct sample size important?

To ensure the sample is representative of the population and the results are statistically significant.

200

What is one advantage of using a sample over a census?

It is less time-consuming and less expensive.

200

Why is sampling used in opinion polls?

To gather information about the opinions of a population without surveying everyone.

400

What is the main purpose of sampling?

To make inferences about a population without having to survey the entire population.

400

What is stratified sampling?

A method of sampling that involves dividing a population into subgroups (strata) and taking a sample from each stratum.

400

What is the margin of error?

 An expression of the amount of random sampling error in a survey's results.

400

 Name a disadvantage of convenience sampling.

 It can lead to biased results because it does not represent the entire population.

400

How is sampling used in quality control?

By testing a sample of products to infer the quality of the entire batch.

600

What is a population in the context of sampling?

 The entire group of individuals or instances about whom the study is concerned.

600

Define cluster sampling.

A sampling technique where the entire population is divided into groups, or clusters, and a random sample of these clusters is selected.

600

 Name one factor that affects sample size determination.

Population size.

600

What is an advantage of stratified sampling?

It ensures that different subgroups are adequately represented in the sample.

600

In a humanitarian research, why might a sample be used instead of the entire population?

Because it is often impractical or unethical to study the entire population.

800

 Define "sampling frame"

A list or other device used to define a researcher’s population of interest.

800

What is systematic sampling?

A method of sampling where every nth individual is selected from a list or queue.

800

What is the confidence level in the context of sample size determination?

The probability that the value of a parameter falls within a specified range of values.

800

What is a disadvantage of cluster sampling?

 It can increase sampling error if clusters are not homogeneous.

800

Give an example of cluster sampling in an educational project or research.

Selecting entire classrooms or schools as clusters to study educational outcomes.

1000

What is a sampling error?

The error caused by observing a sample instead of the whole population, which can lead to differences between the sample statistic and the actual population parameter.

1000

Name a type of non-probability sampling.

Convenience sampling.

1000

How do you calculate the sample size for a proportion?

Let the class show the formula!

1000

Name an advantage of using a larger sample size.

It reduces the margin of error and increases the reliability of the results.

1000

How is stratified sampling useful in humanitarian needs assessments?

 It ensures different subgroups within the affected population (e.g., different age groups, genders, or geographic regions) are adequately represented in the sample.

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