Author Question: Describe how transformations can be used to apply linear regression to nonlinear ... (Read 90 times)

Haya94 · **on:** Jun 29, 2018

Describe how transformations can be used to apply linear regression to nonlinear relationships.

Question 2

The null hypothesis for an ANOVA test comparing the means of three groups is: 1 2 3.

Indicate whether the statement is true or false

meltdown117 · **Reply #1 on:** Jun 29, 2018

Answer to Question 1

Transformations are used on variables that are not linearly related to arrive at a linear relationship between the dependent variable and the transformed variables. If Y is not linearly related to X, researchers might try logarithmic, exponential, or geometric relationships. For example:
Y vs. log(X)
log(Y) vs. X
log(Y) vs. log(X)
Y vs. X2
Y2 vs. X2
Y vs. X, X2, X3,.... Xk (polynomial)
log(Y) vs. log(a) + bX
log(Y) vs. log(a) + b log(X)

Answer to Question 2

F
The null hypothesis is that the means of the three groups are equal.