State your a priori hypothesis about the sign of the slope. Is it reasonable to suppose a cause- and-effect relationship?
Answer to relevant QuestionsMake a scatter plot of Y against X. Discuss what it tells you. Study the table of residuals. Identify as outliers any standardized residuals that exceed 3 and as unusual any that exceed 2. Can you suggest any reasons for these unusual residuals? Order Size and Shipping Cost (n = 12) (a) Make a scatter plot of the data. What does it suggest about the correlation between X and Y? (b) Use Excel, MegaStat, or MINITAB to calculate the correlation coefficient. (c) Use ...Choose one of these three data sets. (a) Make a scatter plot. (b) Let Excel estimate the regression line, with fitted equation and R2. (c) Describe the t of the regression. (d) Write the fitted regression equation and ...Adult height is somewhat predictable from average height of both parents. For females, a commonly used equation is YourHeight = ParentHeight – 2.5 while for males the equation is YourHeight = ParentHeight + 2.5. (a) Test ...
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