Which of the Following Statements About Trend Analysis Is True

Multiple Choice

Which of the following statements about trend analysis is true?

A) The independent variable should not be on the nominal scale.
B) If the factor has 3 levels, we can test the linear trend, the quadratic trend, and the
Cubic trend.
C) The set of contrasts are not necessarily orthogonal.
D) If there is a significant linear trend, there cannot be a significant quadratic trend.