September 3, 1999

Quickie Questions 2


  1. What criterion do we use to determine that percents calculated from samples of one size tend to be more accurate than percents calculated from samples of another size?


  2. What did Dr. Thompson mean when he said, "We reach a point of diminishing returns" when we try to increase sampling accuracy by making sample sizes larger and larger.



  3. The histogram below shows the simulated results of drawing 2000 samples of 500 marbles from a jar having a gazillion marbles in it, 57% of which were red.

a) What does "285" on the horizontal axis stand for?

b) What does "100" on the vertical axis stand for?

c) What is represented by the highlighted slice of the bar above 300-305?