To score the AP Statistics Exam ETS hires Exam Readers, Table Leaders, and other Leadership. Each reading room consists of 16 Exam Readers and 2 Table Leaders. There are 100 reading rooms. The 18 members of Other Leadership work together in a room. a. Describe how to select a stratified random sample of 36 people hired by ETS to score the AP Statistics Exams. Explain your choice of strata.

b. Describe how to select a cluster sample of 36 people hired by Ets to score the AP Statistics Exams. Explain your choice of cluster.

c. Explain a benefit of using a stratified random sample and a benefit of using a cluster random samplein this context.

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j

like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.