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Class 11 Economics (Statistics For Economics) Chapter 7 Correlation Quiz 1 (25 MCQs)

Quiz Instructions

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1. What does standard deviation represent?
2. A correlation of-.90 between two sets of scores indicates that people who earned high scores on their first SAT generally earned ..... scores on the second.
3. ..... correlation is when one set of data increases and the other set of data decreases.
4. Name the correlation in this sentence:A runner's time and the distance to the finish line.
5. Correlations show cause and effect
6. The correlation coefficient, is always between ..... and .....
7. A perfect negative correlation has a correlation coefficient of .....
8. What is reliability?
9. How do you calculate a residual?
10. R is affected by influential points.
11. What type of correlation exists between the amount of time a candle is burned and the height of the candle.
12. What would you use to determine whether significant differences were observed between all levels of your independent variable?
13. Spending time with animals reduces stress.Independent variable: .....
14. The direction of a correlation can be positive or negative.
15. What type of correlation (association)?The outside temperature and the amount of layers you wear.
16. You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?
17. Variables X and Y have r = 0.40. If we decrease each X value by 0.1, double each Y value, and then interchange them (put X on the Y-axis and vice versa) the new correlation will be
18. Number of days absent from school vs. math average
19. Score on science exam and number of words written on the essay question. $r=.28$
20. ALL but one of the statements below contains a mistake. Which one could be true?
21. Which of the following is true for correlation coefficients?
22. R is only useful for .....
23. What is a scatter plot?
24. Strong or weak
25. Describe the correlation: "The number of pages you have read in a book and the number of pages remaining."
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