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Unformatted text preview: Exam 1 Review Statistics 110, Spring 2011 Page 1 of 8 Notes Exam 1 will be administered on Tuesday, February 22. The exam will cover Chapters 1 8 and 10 13. Review all concepts, examples, iClicker problems, and homework assignments from these chapters. The review problems presented below are from a previous semester and may not cover all of the material that will be on the exam. In addition, the Chapters 10 12 handout and the Empirical Rule worksheet should be reviewed. A formula sheet will be provided. You can view a copy of the formula sheet on Blackboard under Course Documents in the Exam Material folder. Materials Needed Calculator Number 2 pencil (scantrons will be used to record your responses) Correct Answers Problem Answer 1 B 2 A 3 A 4 B 5 D 6 D 7 B 8 A 9 D 10 C 11 D 12 C 13 A 14 C 15 A 16 B 17 A 18 C 19 B 20 A 21 C 22 D 23 A 24 B 25 A Exam 1 Review Statistics 110, Spring 2011 Page 2 of 8 Review Problems Questions 1 3 are based on the following description: A psychological assessment company has produced a new testing instrument to measure youth aggression. In the brochure advertisement for the new instrument, the company calls it a Valid and Reliable measure of youth aggression. 1. For this instrument to be reliable, which of the following statements must be true? A) The instrument actually measures youth aggression. B) Repeated measurements taken with the instrument on the same child produce the same (or approximately the same) value. C) The measurements from the instrument are always lower or higher than the true value. D) The instrument can be used to measure multiple children. 2. After conducting numerous studies using the new testing instrument, it was shown that children with high scores tend to be more aggressive than children with lower scores. As a measure of youth aggression, scores on the new testing instrument have A) Predictive validity B) Statistical significance C) Informed consent D) Confounding 3. The parent of one of the children who scored high believes that the new testing instrument produces biased results. If the new testing instrument is indeed biased, what could be done to reduce bias? A) Use a more accurate instrument B) Use the first measurement from the instrument C) Measure multiple times and use the average of the measurements as the final value D) Use the final measurement from the instrument Questions 4 5 are based on the following description: SAT math scores have a normal distribution with a mean of 518 and a standard deviation of 114. SAT math scores have a normal distribution with a mean of 518 and a standard deviation of 114....
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- Spring '07