AP Stats Unit 3 Review Questions And All Correct Answers.

Randomizing - Answer Protects us from the influence of all the features of our population by making sure that the sample properly looks like the population Simulation - Answer mimics reality by using random numbers to represent the outcomes of real events Response Variable - Answer A trial's outcome Census - Answer Taking a sample of the entire population Trial - Answer Each time we obtain a simulated answer to our question Population Parameter - Answer A parameter (summary) of a population Sample Statistic - Answer A summary of a sample Representative Sample - Answer A sample that reflects the corresponding parameter accurately Simple Random Sample - Answer A sample where each combination of people has an equal chance of being selected Sampling Frame - Answer The list if individuals from which the sample is drawn from Sampling Variability - Answer The sample-to-sample differences from the use of randomness Cluster Sampling - Answer -Split into representative clusters and then taking a census of one whole cluster -selected for reasons of efficiency, practicality, or cost -Example: sampling neighborhoods and selecting one whole block Multistage Sampling - Answer -Sampling schemes that combine several methods -Most multistage use some sort of stratification and cluster sampling