Question

What is the simple random sample? Provide two examples.

Answer 1

=> A simple random sample is a subset of a statistical population in which each member of the subset has an equal probability of being chosen.

=>A simple random sample is meant to be an unbiased representation of a group.

=>Simple random sampling is a basic type of sampling, since it can be a component of other more complex sampling methods.

=> The principle of simple random sampling is that every object has the same probability of being chosen.

EXAMPLES:

1.

=> An example of a simple random sample would be the names of 25 employees being chosen out of a hat from a company of 250 employees. In this case, the population is all 250 employees, and the sample is random because each employee has an equal chance of being chosen. Random sampling is used in science to conduct randomized control tests or for blinded experiments.

2.

• At a birthday party, teams are chosen by putting everyone's name into a jar, then choosing names for each team.
• To test the quality of a river's water, samples of the water would be taken from multiple places in the river, on different dates and at different times of the day. All of the samples would be numbered with the numbers entered into a table. As numbers are chosen from the table, quality tests are run on the chosen sample