Determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience). а. А soccer coach selects six players from a group of boys aged eight to ten, seven players from a...

Extracted text: Determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience). а. А soccer coach selects six players from a group of boys aged eight to ten, seven players from a group of boys aged 11 to 12, and three players from a group of boys aged 13 to 14 to form a recreational soccer team. b. A pollster interviews all human resource personnel in five different high tech companies. С. А high school educational researcher interviews 50 high school female teachers and 50 high school male teachers. d. A medical researcher interviews every third cancer patient from a list of cancer patients at a local hospital. е. А high school counselor uses a computer to generate 50 random numbers and then picks students whose names correspond to the numbers. f. A student interviews classmates in his algebra class to determine how many pairs of jeans a student owns, on the average.