Unit 3 Lesson 33 Exit Ticket

Answer each questions completely using well written sentences.

An advertisement for an upcoming TV show asked: “Should handgun control be tougher? You call the shots in a special call-in poll tonight. If yes, call 1-900-720-6181. If no, call 1-900-720-6182. Charge is 50 cents for the first minute.” Over 90% of people who called in said “Yes.”

What type of sampling method is this? Explain why this opinion poll is almost certainly biased.

To determine the rate of childhood obesity at her school, the campus nurse at a local elementary school that has a population of 800 elementary children (grades kindergarten to 5th) decides to take a sample of 80 children to estimate what percentage of the school’s students are considered obese. 

Part a: Identify the population and sample of the situation. 

Part b: How should the nurse select a simple random sample of her students?