A scatterplot is shown. 12 10 8. 4 X 2 4 6 8 10 12 What statement about the scatterplot is true? A There is no association between x and y. B) There is no association between x and y. There is a negative linear -association 2.
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- Which scatterplot shows a nonlinear association?which scatter plot shows a non linear association between the two variables6) 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 scatter plots that true linear 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 variablesLet 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.
- 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 only6) Multiple Choice (ONE answer) The correlation coefficient, r, between variables x and y is -0.9. Which statement correctly justifies the type of association between x and y? А. They have a weak negative linear association because the correlation coefficient is negative. They have a strong negative linear association because the correlation coefficient is close to -1. С. They have a strong positive linear association because the correlation coefficient has a large value. D. They have a nonlinear association because the correlation coefficient is negative. B.Determine whether each of the following situations describes a positive association, a negative association, or no association.
- The correlation coefficient, r, developed by Karl Pearson in the early 1900s, is numerical and provides a measure of strength and direction of the linear association between the independent variable x and the dependent variable y. Group of answer choices True FalseIf a scatterplot shows strong, negative association and nonlinear form then the correlation r is very close to -1. Select one: True or FalseWhich one of these describes a positive correlation? A) Increases in X tend to be accompanied by decreases in Y B) Decreases in X tend to be accompanied by decreases in Y C) Decreases in X tend to be accompanied by increases in Y D) A stronger relationship exists than if the correlation were negative