The table gives the height as time passes of a typical pine tree grown for lumber at a managed site. Tree age (years) 14 21 28 35 42 49 Height (feet) 41 54 64 72 78 83 Source: Arkansas Forestry Commission If Hstd is the height of the tree after t years, construct a table of estimated values for H9 and sketch its graph.

04/08/16 – Data Analysis Notes Multiple Regression - Allows you to look at the simultaneous effect on more than one variable Tells you the individual effect for any one of those variables when controlling for the effects of the others. F-test – tells us whether the full set of variables has an effect on the independent variable Beta – a measure of the relative strength of the effect of that particular variable (which variable in the model has the strongest effects) Multiple regression also allows us to look for interaction between variables Multiple regression requires numeric variables (ex: years of income, age, etc.) Dummy variable – is a variable that stands in place in one of those categories Dummy variables…you create one less category Example: