DS212_HW3

DS212_HW3 - DS 212 Business Statistics Soorapanth Homework...

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DS 212 Business Statistics Soorapanth Homework #3: Chapter 12 Simple Regression Analysis and Correlation Do the following problems: 12.6, 12.7, 12.8, 12.11. Note: You can use Excel to sketch scatter plots in problems 12.6 and 12.7. Additional problems : (1) Based on problem 12.6, answer the following questions: Would the coefficient of correlation be -1, between -1 and 0, 0, between 0 and 1, or 1? Why? What is the predicted value of y when x is equal to 15? (2) Based on problem 12.7, answer the following questions: Is there a positive, negative, or no relationship between x and y? Why? What is the predicted value of y when x is equal to 80? (3) Based on problem 12.8, answer the following questions: What are the dependent and independent variables for this problem? Would the coefficient of correlation be -1, between -1 and 0, 0, between 0 and 1, or 1? Why? What is the predicted value of total sales if the corporation spends 50 millions of dollars in advertising? (4) Based on problem 12.11, answer the following questions:
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DS212_HW3 - DS 212 Business Statistics Soorapanth Homework...

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