PSY3204 CHAPTER 6 QUIZ

# PSY3204 CHAPTER 6 - 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

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PSY3204 CHAPTER 6 QUIZ 1. A scatter plot ____. Is a graph of paired X and Y values 2. If a relationship is linear, ____. The relation can be most accurately represented by a straight line 3. Y can be most accurately predicted from X if the correlation between X and Y is ____. -0.98 4. When a correlation exists, lowering the range of either of the variables will ____. Lower the correlation 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 1 2 3 4 5 6 Weight (lbs) 110 114 112 108 116 113 5. Refer to Exhibit 6-2. What is the appropriate correlation coefficient for this data? Rho 6. For the data in Exhibit 6-2, the correlation equals ____. 0.31 7. If N is small, an extreme score______. Might have a large effect on the value of r obt 8. What is the slope for the points X 1 = 30, Y 1 = 50 and X 2 = 25 and Y 2 = 40? 2.00 9. You have conducted a brilliant study which correlates IQ score with

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Unformatted text preview: 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? R will remain the same 10. If one calculates r for raw scores, and then calculates r on the z scores of the same data, the value of r will ____. Stay the same 11. If 49% of the total variability of Y is accounted for by X , what is the value of r ? 0.70 Height 60 64 65 68 Weight 103 122 137 132 12. What is the value of r for the following relationship between height and weight? 0.87 X 20 15 6 10 Y 6 5 4 13. 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. 34% 14. What is the value of the Spearman rank order correlation coefficient (rho) for the following pairs of ranks? 0.50 15. In order to properly use rho, the variables must be of at least ____ scaling. ordinal...
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## This note was uploaded on 06/20/2011 for the course PSYCHOLOGY 3204 taught by Professor Someone during the Summer '11 term at University of Central Florida.

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PSY3204 CHAPTER 6 - 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

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