# 03-02_task (1).docx - APStatistics 3.02 Looking at the Data...

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AP Statistics 3.02 Looking at the Data Directions: Complete the assignment. Clearly label each answer. Your answers for this assignment must include reasons; simply stating the answer without justification will earn partial credit. (32 points) 1. Below are four data sets. For each data set sketch a scatterplot (2 points each), draw a regression line (2 points each), and calculate the correlation coefficient r (2 points each). Provide a statement regarding how well the correlation coefficient, r, measures the relationship of the x and y variables. (2 points each). x1 y1 x2 y2 x3 y3 x4 y4 1 2 2 4 1 1 8 2 3 4 3 9 2 4 7 4 5 6 4 16 3 9 6 20 7 8 5 25 4 16 5 5 9 11 6 36 5 25 8 3 12 15 7 49 6 16 7 5 16 20 8 64 7 9 6 5 17 22 9 81 8 4 5 6 22 28 1 1 9 2 4 7 29 36 0 0 1 0 3 8 36 48 10 100 0 1 2 9 Set 1 (x 1 , y 1 ) Insert scatterplot and regression line. Correlation coefficient: R = 0.9984 How well does the correlation coefficient, r, measures the relationship of the x and y variables? This is a strong positive correlation, meaning the high x variables go with the high y variables. Set 2 (x 2 , y 2 ) Insert scatterplot and regression line.   #### You've reached the end of your free preview.

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• Summer '17
• Gallo, S
• Correlation Coefficient, Correlation and dependence, Pearson product-moment correlation coefficient
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