A technique called sampling is sometimes used to estimate population size. In this procedure, the organisms in a few small areas
are counted and projected to the entire area. For instance, if a biologist
counts 10 squirrels living in a 200 square foot area, she could predict that there are 100 squirrels living in
a 2000 square foot are a.

1. A biologist collected 1 gallon of pond water and counted 50 paramecium. Based on the sampling
technique, how many paramecium could be found in the pond if the pond were 1,000 gallons?

2. What are some problems with this technique? What could affect its accuracy?