all quizzes til exam 2 - CHAPTER 6 A scatter plot ____....

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Unformatted text preview: CHAPTER 6 A scatter plot ____. Student Response Correct Answer 1. must be linear 2. is a frequency graph of X values 3. has to do with electron scatter 4. is a graph of paired X and Y values Score: 1/1 2. If a relationship is linear, ____. Score: 1/1 3. In the equation, Y = bX + a , X and Y are ____. Score: 1/1 4. In an imperfect relationship, ____. Score: 1/1 5. The closer the points on a scatter diagram fall to the regression line, the ____ between the scores. Score: 1/1 6. Y can be most accurately predicted from X if the correlation between X and Y is ____. Score: 1/1 7. If the correlation between two variables is - 1.00 and the score of a given individual is 2.20 standard deviations above the mean on one of the variables, we would predict a score on the second variable of ____. Score: 1/1 8. When a correlation exists, lowering the range of either of the variables will ____. Score: 1/1 9. Exhibit 6-2 A researcher wanted to know if the order in which runners finish a race is correlated with their weight. She conducts an experiment and the data is given below. Finishing order Weight (lbs) Refer to Exhibit 6-2. What is the appropriate correlation coefficient for this data? Score: 1/1 10. Exhibit 6-2 A researcher wanted to know if the order in which runners finish a race is correlated with their weight. She conducts an experiment and the data is given below. Finishing order Weight (lbs) For the data in Exhibit 6-2, the correlation equals ____. Score: 0/1 11. If N is small, an extreme score ____. Score: 1/1 12. What is the slope for the points X 1 = 30, Y 1 = 50 and X 2 = 25 and Y 2 = 40? Score: 1/1 13. You have conducted a brilliant study which correlates IQ score with income and find a value of r = 0.75. At the end of the study you find out all the IQ scores were scored 10 points too high. What will the value of r be with the corrected data? Score: 0/1 14. If one calculates r for raw scores, and then calculates r on the z scores of the same data, the value of r will ____. Score: 1/1 15. If 49% of the total variability of Y is accounted for by X , what is the value of r ? Score: 1/1 16. What is the value of r for the following relationship between height and weight? Height Weight Score: 1/1 17. For the following X and Y scores, how much of the variability of Y is accounted for by knowledge of X ? Assume a linear relationship. X Y Score: 1/1 18. What is the value of the Spearman rank order correlation coefficient (rho) for the following pairs of ranks?...
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This note was uploaded on 07/19/2009 for the course PSY 3204 taught by Professor Shahramghiasinejad during the Summer '09 term at University of Central Florida.

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all quizzes til exam 2 - CHAPTER 6 A scatter plot ____....

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