Quiz on Research Methodology and Statistics

Which of the following best describes a sample in research?

• The entire group being studied

• A subset of the population selected for analysis

• A random selection of all individuals

• A specific case within the population

What does a sample represent in research?

• The entire population

• A subgroup of the population

• The sampling frame

• A random selection of cases

What is a sampling frame?

• The characteristics of the sample

• A list of all elements in the population

• The total number of samples needed

• The method of selecting samples

What is sampling bias?

• The process of calculating sample size

• The random selection of samples

• Over or under-representation of sample characteristics

• The withdrawal of subjects from a study

What is the purpose of inclusion criteria?

• To calculate sample size

• To define what the sample does not possess

• To specify population characteristics

• To enhance sampling bias

Which of the following is a characteristic of a good sample?

• Large in size only

• Free from bias/error

• Diverse in characteristics

• Randomly selected

What type of sampling method allows every subject an equal chance of being selected?

• Judgmental sampling

• Non-probability sampling

• Convenience sampling

• Probability sampling

Which sampling technique involves dividing the population into subgroups?

• Simple random sampling

• Cluster sampling

• Convenience sampling

• Stratified random sampling

What is the main limitation of convenience sampling?

• It requires a large population

• It may lead to bias and errors

• It is the most accurate method

• It is time-consuming

What does sampling error refer to?

• The process of selecting a sample

• Statistical variation from one sample to another

• The loss of subjects from a study

• The characteristics of the population