Question

select the correct choices that complete the sentences. in a every possible sample of size n has an equally likely chance of occurring. a is obtained by dividing the population into nonoverlapping groups called strata and then obtaining a simple random sample from each stratum. the individuals within each stratum should be similar in some way. a is obtained by selecting every kth individual from the population. the first individual selected corresponds to a number between 1 and k. a is obtained by selecting all individuals within a randomly selected collection or group of individuals. a is a sample in which the individuals are easily obtained and not based on randomness. studies based on this type of sampling method have results that are suspect.

Explanation:

1. In a simple - random sample, every possible sample of size n has an equally likely chance of occurring. This is the basic definition of simple - random sampling.
2. A stratified sample is obtained by dividing the population into non - overlapping groups (strata) and then getting a simple random sample from each stratum. The individuals within each stratum share some similarity.
3. A systematic sample is obtained by selecting every kth individual from the population, with the first individual corresponding to a number between 1 and k.
4. A cluster sample is obtained by selecting all individuals within a randomly selected collection or group of individuals.
5. A convenience sample is a sample in which the individuals are easily obtained and not based on randomness, and studies using it often have suspect results.

Answer:

1. simple - random sample
2. stratified sample
3. systematic sample
4. cluster sample
5. convenience sample