Which of the following best describes random sampling?

• Selecting individuals who are easiest to reach

• Choosing individuals based on personal preference

• Every member of the population has an equal chance of being selected

• Selecting only individuals who meet a specific criterion

What is the main advantage of random sampling?

• It ensures bias in the sample

• It always leads to a perfect representation of the population

• It reduces bias and allows for generalization to the population

• It guarantees that all characteristics of the population are equally represented

Which of the following is NOT a method of random sampling?

• Simple random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

What is stratified random sampling?

• Selecting every kth individual from a population

• Dividing the population into groups and randomly selecting from each group

• Selecting individuals based on their willingness to participate

• Choosing a sample that is easiest to reach

In systematic sampling, how is the sample selected?

• Every member of the population is assigned a number, and numbers are randomly chosen

• The researcher selects individuals based on characteristics

• Every kth member of the population is chosen

• The population is divided into groups, and a few groups are randomly selected

What is a parameter in statistics?

• A characteristic or measure obtained from a sample

• A characteristic or measure that describes the entire population

• A method used to collect data

• A way of displaying data

A statistic is:

• A measure used to summarize a population

• A characteristic or measure obtained from a sample

• A method of collecting data

• A way of analyzing non-numerical data

Which of the following is an example of a parameter?

• The average height of students in a selected classroom

• The percentage of voters in a survey

• The average income of all citizens in a country

• The test scores of a random group of students

Which term describes a numerical summary of a sample?

• Parameter

• Statistic

• Population

• Census

If a study collects data from an entire population, the measure obtained is called:

• A statistic

• A parameter

• A sample

• A variable