Sampling Interval in Statistics

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What is the main reason for using sampling methods instead of a complete census?

High cost of data analysis

Lack of expertise in data collection

Lack of resources and time constraints (correct)

Difficulty in accessing the entire population

What type of sampling involves selecting every nth individual from a list?

Cluster sampling

Simple random sampling

Systematic sampling (correct)

Stratified sampling

What is the basic principle of simple random sampling?

Each member of the population has an unequal chance of being selected

Each member of the population has an unknown chance of being selected

Each member of the population has a zero chance of being selected

Each member of the population has an equal and known chance of being selected (correct)

What is the advantage of using probability sampling methods?

They provide accurate estimates of the population's characteristics Signup and view all the answers

What is a sampling unit?

A basic unit around which a sampling procedure is planned Signup and view all the answers

What is a sampling frame?

A list of all members of the population Signup and view all the answers

What is the main difference between simple random sampling and systematic sampling?

Systematic sampling involves a gap between each selected unit, while simple random sampling does not Signup and view all the answers

What is required in advance for simple random sampling to be appropriate?

Knowledge of the complete sampling frame Signup and view all the answers

What is the main advantage of simple random sampling?

It is simple to carry out and easy to understand Signup and view all the answers

When is simple random sampling appropriate?

When a good sampling frame exists and the population is geographically concentrated Signup and view all the answers

What is another name for systematic sampling?

Interval sampling Signup and view all the answers

What type of sampling is simple random sampling an example of?

Probability sampling Signup and view all the answers

What is the purpose of determining the sampling interval (k) in interval sampling?

To determine the number of units to be sampled from the population Signup and view all the answers

What is the main advantage of systematic sampling over simple random sampling?

It ensures coverage of the whole spectrum of units Signup and view all the answers

What is the main disadvantage of interval sampling?

It may arise as a sampling problem to meet adequate sample size Signup and view all the answers

What is the purpose of stratified sampling?

To produce a more representative and accurate sample Signup and view all the answers

What is the difference between proportionate and disproportionate stratified random sampling?

Proportionate sampling ensures that the sample size of each stratum is proportionate to the population size, while disproportionate sampling does not Signup and view all the answers

What is the main advantage of cluster sampling?

It is cost-effective and time-efficient Signup and view all the answers

What is the purpose of a sampling frame in probability sampling?

To provide a complete list of all units in the population Signup and view all the answers

What is the difference between probability and non-probability sampling?

Probability sampling ensures that every unit in the population has an equal chance of being selected, while non-probability sampling does not Signup and view all the answers

What is the purpose of randomization in probability sampling?

To reduce bias in the sampling process Signup and view all the answers

What is the main advantage of stratified sampling over simple random sampling?

It produces more precise estimates of population parameters Signup and view all the answers