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Final Exam Study Guide_fall2009

Final Exam Study Guide_fall2009 - HP 340 Final Exam Study...

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HP 340 Final Exam Study Guide This covers most everything that will be on the exam. If you can answer all these questions, you should be in pretty good shape. Define the following terms & be able to give an example of each: 1. Dependent variable: 2. Independent variable 3. Statistic 4. Population 5. Sample 6. Parameter 7. Descriptive statistics 8. Inferential statistics

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10. What are the four measurement scales? Give an example of each. Nominal Ordinal Interval Ratio 11. What is the difference between a categorical and continuous variable? Give an example of each. 12. What are the characteristics of a mean? 13. What is the difference between parametric and non-parametric tests? 14. What is the least-squares regression line? Why is it used? 15. What is the standard error of the estimate? Why do we measure this? How is it symbolized? 16. What is a correlation coefficient?
17. What is the possible range of values of a correlation? 18. How are Pearson’s r and Spearman’s r different (conceptually)? 19. In regression, b symbolizes ______________? Thus, for every one unit change in X, there will be a _______change in Y. 20. Using regression, we find the equation for the relationship between cigarettes/day (x) and upper-respiratory infections/year (URI). The equation is: URI = .10x + .5 . On average, how many URIs does a non-smoker get per year? For every cigarette smoked, there is a _______ /year (increase/decrease) in URIs. 21. If the correlation coefficient is positive, the b will be positive, negative, or zero? 22. To compute the Mann-Whitney U statistic to compare the distribution of two groups, the raw scores need to be __________.

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5, 2, 8, 2, 3, 2, 4, 12, 16, 3, 5 24. Using the above numbers, calculate the following, assuming the distribution is a population: a. Mean = b. Median = c. Mode = d. Standard Deviation= e. Variance= 25. What can be said about the order of the mean, median, and mode for each of the following: a. Normal distribution: b. positively skewed distribution: c. negatively skewed distribution: 26. Compare and contrast the mean, median, and mode with respect to a) their sensitivity to extreme scores. 27. How is alpha used in the test of Ho? 28. Define Type I and Type II errors? 29. What is alpha’s relationship to Type I and Type II errors?
30. What is central limit theorem? 31. What is the difference between directional(one-tailed) and non-directional (two-tailed) hypotheses? 32. Why can’t an F-statistic be negative?

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1 . In a standard normal distribution, the mean is _______ and the standard deviation is ________. 2. Assume that the scores are normally distributed on a test with a population mean of 75 and standard deviation equal to 16. a. What percent of scores are lower than 67 and higher than 92? b. What percentage of scores are between a 59 and 91? c. What score has 93% of the scores below it? 3. If a population of scores is normally distributed, has a mean of 45 and a standard deviation of 6, what score(s) do the most extreme 5% of the scores lie beyond?
For the following, list the test or tests that could be used to solve the problem or answer the question. For questions with a (*), you may solve them if you would like.

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Final Exam Study Guide_fall2009 - HP 340 Final Exam Study...

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