Packet 5 TestPrep - Test 5A Directions Work on these sheets...

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Chapter 5 1 Test 5A Test 5A AP Statistics Name: Directions: Work on these sheets. Part 1: Multiple Choice. Circle the letter corresponding to the best answer. 1. What do we call a sample that consists of the entire population? (a) A stratum (b) A multistage sample (c) A mistake. A sample can never be the entire population. (d) A census (e) None of the above. The answer is _________________________. 2. To test the effect of music on productivity, workers are observed. For one month background music is played. For another month, no music is played. This is an example of 3. Which of the following is a method for improving the accuracy of a sample? 4. We say that the design of a study is biased if which of the following is true? 5. Control groups are used in experiments in order to (a) control the effects of outside variables on the outcome. (b) control the subjects of a study to ensure that all participate equally. (c) guarantee that someone other than the investigators, who have a vested interest in the outcome, controls how the experiment is conducted. (d) achieve a proper and uniform level of randomization. (e) None of the above. The answer is ______________________________.
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