Graph a step function that represents this situation.

Sampling 1/23/17 Sample is usually smaller than population Ex. 100 out of 500 people at a concert Ex. 300 out of 20,000 students at the U of M Census – need to know everyone’s opinions Convenient sample – easy for the person doing the sample Examples: People who have a 9:20 am class o n = size of the sample, n = 70 representative random sample o 31 of 70 said “yes” o 31/70 = .44 = 44% o 1/√n = 1/√70 = 0.1195 = 0.12 = 12% o Margin of error 44% +/- 12% = 32%, 56% Population will be a range of 2 numbers 53 out of 100 people o n = 100 o 1/√n = 1/√100 = 1/10 = 0.1 = 10% o Margin of error 53