A farmer is researching the effectiveness of a pest control spray He divides his orchard into 5 sections He then inspects all the trees within 2 of those sections What type of sampling method is he using O Cluster Sampling O Convenience Sampling O Stratified Random Sampling O Systematic Sampling QUESTION 9 Good Housekeeping magazine wants to collect data on customers interests The September issue has a survey included for customers to fill out and then mail back to the magazine headquarters What type of sampling method is being used O Cluster Sampling O Convenience Sampling