Section 1.2 Simple Random Sampling

What is the objective of Section 1.2 in MAT 157 Statistics?

Introduce the process of random sampling.

What is a census in data collection?

A method to obtain the information for the entire population of interest.

What is the difference between sampling and census?

Sampling obtains information for a smaller subset of the population, while a census gathers information for the entire population.

What is a representative sample?

A sample that is made up of the same elements that make up the population in similar proportions.

What is selection bias?

A problem in choosing a sample where the data is biased towards a certain group, leading to unrepresentative outcomes.

What is probability sampling?

A method that uses a random device to select a sample, helping to eliminate bias.

Define Simple Random Sampling (SRS).

A sampling procedure in which each possible sample of a given size is equally likely to be the one obtained.

What does SRSWR stand for?

Simple Random Sampling With Replacement.

Give an example of SRS without Replacement.

Picking a winning lottery ticket where the ticket is not returned for future selections.

What is a random number table used for?

To randomly select subjects from a larger population.

How can technology assist in random sampling?

Technology can provide random number generators, making selection faster and easier.