Question

1. what are two ways to avoid a nonrandom sample?

Explanation:

Random sampling methods like simple random sampling (where every element has an equal chance of being selected) and stratified random sampling (dividing the population into strata and sampling from each stratum randomly) can be used. Simple random sampling ensures unbiased selection from the whole population, and stratified random sampling accounts for different subgroups within the population to make the sample more representative.

Answer:

1. Use simple random sampling.
2. Use stratified random sampling.