What type of sampling procedure would be used if I choose to study teachers of previous school shooters to see if there were any correlating characteristics among the attackers while in school? First choose if probability or non- probability sampling, then choose which sample I should use from the list provided below. Probability: simple random sampling, systemic sampling, stratified sampling, disproportionate stratified sampling, or multistage cluster sampling Non-probability: purposive/judgmental sampling, quota sampling, or snowball sampling