3. A study examined the relationship between the sepal length and sepal width for two varieties of an exout Varieties X and O are represented by x's and o's, respectively, in the following scatterplot. Which of the following statements is true? 2.0 15 dvorit now sas ent 1.0 anoifelem Of 0.5 * * 0.0 10 12 16 width A. Considering Variety X only, there is a positive correlation between sepal length and width. B. Considering Variety O only, the least-squares regression line for predicting sepal length from sepal width has a positive slope. C. Considering both varieties together, there is a negative correlation between sepal length and width. D. Considering each variety separately, there is a negative correlation between sepal length and width. E . Considering both varieties together, the least-squares regression line for predicting sepal length from sepal width has a negative slope. 4. A scatterplot of student height, in inches, versus corresponding arm span length, in inches, is shown below. One of the points in the graph is labeled A. 74 plelemet tol sonisbivs . 72 70+ 68- A 7103 66+ 64 62 60. ed of 65 70 75 Height If the point labeled A is removed, which of the following statements would be true? [A) A. The slope of the least squares regression line is unchanged and the correlation coefficient increases. B. The slope of the least squares regression line is unchanged and the correlation coefficient decreases. C. The slope of the least squares regression line increases and the correlation coefficient increases. D. The slope of the least squares regression line increases and the correlation coefficient decreases. E . The slope of the least squares regression line decreases and the correlation coefficient increases