Changes

A '''simple random sample''' (sometimes '''SRS''', oftentimes '''random sample''') is a method of taking a sample from the target population  with completely randomised selection in order to minimise bias. More complex versions of the simple random sample include [[stratified random sampling]] and introducing [[block design]] to an experiment.

A '''simple random sample''' (sometimes '''SRS''', oftentimes '''random sample''') is a method of taking a sample from the target population  with completely randomized selection in order to minimize bias. More complex versions of the simple random sample include [[stratified random sampling]] and introducing [[block design]] to an experiment.

==Example==

==Example==

A school inspector wants to learn how many students like pizza lunches. The inspector decides to take a sample of the 2400 students, and wants a sample size of 200. How should she choose the sample?

A school inspector wants to learn how many students like pizza lunches. The inspector decides to take a sample of the 2400 students, and wants a sample size of 200. How should she choose the sample?

She should alphabetise the students, then label the students 0001-2400. Then, she will use a random number generator or a random digit sheet to select students, skipping repeat numbers and skipping numbers over 2400.

She should alphabetize the students, then label the students 0001-2400. Then, she will use a random number generator or a random digit sheet to select students, skipping repeat numbers and skipping numbers over 2400.

[[Category:Probability and Statistics]]

[[Category:Probability and Statistics]]