Convenience Simple random sample is the

stratified;

183. Determine the type of sampling used. A pollster interviews all human resource personnel in five different high tech companies

cluster;

184. Determine the type of sampling used. A high school educational researcher interviews 50 high school female teachers and 50 high school male teachers

stratified;

185. Determine the type of sampling used. A medical researcher interviews every third cancer patient from a list of cancer patients at a local hospital

Systematic;

186. Determine the type of sampling used. A high school counselor uses a computer to generate 50 random numbers and then picks students whose names correspond to the numbers

random

187. Determine the type of sampling used. A student interviews classmates in his algebra class to determine how many pairs of jeans a student owns, on the average

convenience

188. The Smell & Taste Treatment and Research Foundation conducted a study to investigate whether smell can affect learning. Subjects completed mazes multiple times while wearing masks. They completed the pencil and paper mazes three times wearing floral-scented masks, and three times with unscented masks. Participants were assigned at random to wear the floral mask during the first three trials or during the last three trials. For each trial, researchers recorded the time it took to complete the maze and the subject’s impression of the mask’s scent: positive, negative, or neutral. Describe the explanatory in this study.