of the scatterplots to the right or no association? gative association? association? ear eak or moderately strong ass ery strong association?
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- 6) For the 2006 GSS, f = 0.22 for the relationship between job satisfaction (categories very dissatisfied, moderately dissatisfied, moderately satisfied, very satisfied) and income (below average, average, above average). Would you consider this a very strong or relatively weak association? Explain. (Note: the ŷ symbol is gamma hat, not “y hat")Which of the following situations would indicate a negative association?Which of the scatterplots in the picture show each other the following? a) no association? b) a negative association? c) a linear association? d) a weak or moderate association? e) a very strong association?
- Let the coefficient of correlation of two variables X and Y be larger than zero. What will be the effect on it, if the data of X are multiplied by the factor of 2? a) The effect depends on the data of X. b) It depends on Y . c) The coefficient will be doubled. d) It will be increased fourfold.Scatterplots Which of the scatterplots below showa) little or no association?b) a negative association?c) a linear association?d) a moderately strong association?e) a very strong association?Based on data from a study of the association betweenmiles driven and gallons of gasoline used, let r1 representthe correlation coefficient for (miles, gallons) data points,and let r2 represent the correlation coefficient for (gallons,miles) data points. Which of the following must be true?A) r1 + r2 = 0B) r1 - r2 = 0C) r1 + r2 = 1D) r1 # r2 = 1E) r1 # r2 = -1
- 10:46 ll Done app.edulastic.com AA C E· Question 5/10 > NEXT A scatterplot is shown. 12 10 8 4 2 4 6 8 10 12Determine whether each of the following situations describes a positive association, a negative association, or no association.Which of the following statements is true? a) The correlation coefficient is 0 if there is a perfect positive correlation between two variables b) The correlation coefficient is 1 if there is a perfect positive correlation between two variables c) The correlation coefficient is 0.5 if there is a perfect positive correlation between two variables d) The correlation coefficient is -1 if there is a perfect positive correlation between two variables
- Determine whether the scatterplot shows little or no association, a negative association, a linear association, or a strong association (multiple associations are possible, pick the most descriptive). O A. Positive association and strong association only O B. Positive association only O C. Linear association only O D. Positive association, strong association, linear association O E. Linear association and strong association only8) ŷ = 0.36 for the relationship between income (below average, average, above average) and happiness (not happy, pretty happy, very happy). The 95% CI for y is (0.28, 0.44). Interpret both ŷ (would you consider this a strong association, and in what direction?) and the 95% CI for y (be sure to note whether the CI includes 0). Interpret P: Interpret 95% CI:For the 2006 GSS, = 0.22 for the relationship between job satisfaction (categories very dissatisfied, moderately dissatisfied, moderately satisfied, very satisfied) and income (below average, average, above average). Would you consider this a very strong or relatively weak association? Explain. (Note: the symbol is gamma hat, not “y hat”)
