What position in the distribution corresponds to a z-score of +1.20? Below the mean by 1.20 points Below the mean by a distance equal to 1.20 standard deviations Above the mean by 1.20 points Above the mean by a distance equal to 1.20 standard deviations 999'?" What z-score corresponds to a score that is below the mean by 1 standard deviation? A. -1 B. -2 C. +2 D. +1 If a student's exam score in Chemistry was the same as the mean score for the entire Chemistry class of 35 students, what would that student's z-score be? A. z = 35.00 B. = -0.50 C. 2 = 0.00 D. 2 = +1.00 4. For a population with M = 80 and S = 4, what is the z-score corresponding to X = 36? A. -2 .00 B. +1.00 C. +1.50 D. +2.00 A z-score indicates how an individual performed on a test relative to the other people who took the same test. A. True B. False Suppose the 3000 students taking Introduction to Psychology at a la rge university all take the same nal exam. What can you conclude about a student taking Introduction to Psychology at this university who takes the final exam and has a z-score of -0.80 on the nal exam? The student's score was below the mean of the 3000 students. The student answered correctly on 80 questions. The student's score was equal to the mean of all 3000 students. The student's score was above the mean of the 3000 students. 999'? A person with a z-score of -0.90 would have a percentile rank of: A. 31.59 B. 18.41 C. 81.59 D. none of the above What is indicated by a positive correlation value? A much stronger relationship than if the correlation were negative A much weaker relationship than if the correlation were negative Increases in X tend to be accompanied by increases in Y Increases in X tend to be accompanied by decreases in Y 99?? 10. 11. 12. On a scattergram, suppose the general trend of the points was from the lower left to the upper right. This would indicate that the Pearson r value was negative. A. True B. False Which of the following values of Pearson r shows the greatest strength of relationship? A. 43.78 B. +0.61 C. +0.77 D. 43.80 Research has indicated that individuals who watch more violent content on television also tend to engage in more violent behavior. The correlation between amount of violent content watched on television and amount of violent behavior is an example of a: negative correlation zero correlation positive correlation cause-and-effect relationship P??? Suppose a researcher discovered a value of Pearson r of -0.77 between the length of a person's toes and the number of pairs of shoes the person owns. This finding indicates that, in general, people who own relatively more pairs of shoes have: relatively shorter toes relatively longer toes either very short or very long toes relatively medium-sized toes PPF'? 13. 14. 15. 16. 17. Values of Pearson r may range from to PE??? -1; -2 -1; +1 -1: +2 +1; +2 Suppose you are a researcher and you are interested in knowing how much of the variation in scores on a Sociology test can be explained by IQ scores. What statistical analysis would you use? POP? Frequency distribution Multiple correlation Coefficient of determination Linear regression Suppose a value of Pearson r is calculated for a sample of 47 individuals. In testing for signicance, what degrees of freedom (df) value would be used? POP\"? 47 46 49 none of the above When conducting a correlational study using the Pearson r, what is the null hypothesis? A. There is a non-zero correlation for the population of interest B. The sample correlation is zero C. There is a non-zero correlation for the sample D. The population correlation is zero If a value of Pearson r of 0.72 is statistically significant, what can you do? POP? Make predictions Explain 100% of the variation in the scores Establish cause-and-effect All of the above