I am using the contrasts specification window with + and - buttons. However, when treatments are unequally spaced, the simple + and - isn't working. Here's my specific example:
Treatment doses: 0, 1, 2, 4
These doses are NOT equally spaced so we can not use the typical 4 level linear and quadratic contrasts. I calculated appropriate coefficients as shows in this link.
https://real-statistics.com/one-way-analysis-of-variance-anova/trend-analysis-polynomial-contrast-co...
From my calculations, the linear coefficients should be -7, -3, 1, 9. In JMP, -0.7, -0.3, 0.1, and 0.9 satisfy the JMP requirements of adding up to 0 and absolute value less than 2.
My issue is with quadratic coefficients. From my calculations, the quadratic coefficients should be 224, -128, -256, 160. How do I get these quadratic coefficients into JMP 16 Pro?
Thank you for any and all advice!!