Researchers wanted to study alcohol use by teenagers and observe if there were any differences between cohorts over time. They compared three groups of students (grades 6 to 8, grades 9 to 10, and grades 11 to 12) and focused on the frequency and amount of their alcohol use over a five-year period. They collected useful information about age-related changes, changes within the same individuals as they aged, and were able to account for the possibility of cohort and/or time of measurement effects. This is an example of .

Martin is managing a production line in a manufacturing plant in the midwest. martin has a quality and productivity problem in one part of the manufacturing process. he discovers that his workers aren't sure what to do. when he asks why they didn't ask questions, the universal reply is, "we midwesterners don't ask questions, we just do." martin decides to address this problem by offering recognition rewards for anyone who asks the most job-related questions each month that lead to process improvements. unfortunately, martin finds the program doesn't work. when he further questions his workers, he discovers that no one wants to be the first to ask questions. as a group, workers still feel that they should figure it out on their own and not ask questions. martin finds carmen, one of the workers that everyone else admires, and talks her into being the first to ask questions as part of the program. after about a month, several other people begin to submit questions, and soon everyone in the plant is asking questions. refer to case 6.1. martin's plan failed initially because he didn't consider the power of on attitudes.

Gettysburg address question. lincoln uses the images of birth and rebirth in this address. why?

Including place names directions and distances describe a route harriet tubman was likely to have followed from her slave home near bucktown to philadelphia