The ecologist studying the effects of phytohormones (auxin and cytokinin) on tumor induction in plants by insects, performed an experiment to determine if the form of the cytokinin affected the growth of tumors. She performed treatments each with the same total cytokinin and auxin concentrations, but with individual or mixtures of a few cytokinins (TZ – trans-zeatin, CZ - cis-zeatin, IP – isopentenyl adenosine, and IAA - indole acetic acid). Treatment 1 had auxin (IAA) alone so is not pertinent to the questions asked here, treatment 6 had TZ + IAA, treatment 17 had IP + IAA, treatment 18 had TZ+IP +IAA, treatment 19 had CZ + IAA, and treatment 20 had TZ+CZ+IP+IAA. Perform a priori contrasts comparing the effects of treatments with IP to treatments without IP and treatments with TZ to treatments with CZ (no treatments with both TZ and CZ). Use the data in the file "cytokinin.csv". (Note: Beware of missing value on row 13..)
The ecologist studying the effects of phytohormones (auxin and cytokinin) on tumor induction in plants by insects, performed an experiment to determine if the form of the cytokinin affected the growth of tumors. She performed treatments each with the same total cytokinin and auxin concentrations, but with individual or mixtures of a few cytokinins (TZ – trans-zeatin, CZ - cis-zeatin, IP – isopentenyl adenosine, and IAA - indole acetic acid). Treatment 1 had auxin (IAA) alone so is not pertinent to the questions asked here, treatment 6 had TZ + IAA, treatment 17 had IP + IAA, treatment 18 had TZ+IP +IAA, treatment 19 had CZ + IAA, and treatment 20 had TZ+CZ+IP+IAA.
Perform a priori contrasts comparing the effects of treatments with IP to treatments without IP and treatments with TZ to treatments with CZ (no treatments with both TZ and CZ). Use the data in the file "cytokinin.csv". (Note: Beware of missing value on row 13..)
cytokinin data
| Treatment | sumdiff | |
|---|---|---|
| 1 | 1 | 0.02063830 |
| 2 | 1 | 0.02038461 |
| 3 | 1 | 0.02542857 |
| 4 | 1 | 0.01297872 |
| 5 | 1 | 0.02787234 |
| 6 | 1 | 0.00150000 |
| 7 | 1 | 0.01567568 |
| 8 | 1 | 0.02212766 |
| 9 | 6 | 0.05893617 |
| 10 | 6 | 0.04744681 |
| 11 | 6 | -0.00600000 |
| 12 | 6 | 0.04212766 |
| 13 | 6 | |
| 14 | 6 | 0.03851064 |
| 15 | 6 | 0.02234043 |
| 16 | 6 | 0.02489362 |
| 17 | 17 | 0.04961538 |
| 18 | 17 | 0.03261905 |
| 19 | 17 | 0.05615385 |
| 20 | 17 | 0.02400000 |
| 21 | 17 | 0.03485714 |
| 22 | 17 | 0.06166667 |
| 23 | 17 | 0.07428571 |
| 24 | 17 | 0.04975000 |
| 25 | 18 | 0.07857143 |
| 26 | 18 | 0.06432432 |
| 27 | 18 | 0.05238095 |
| 28 | 18 | 0.04837838 |
| 29 | 18 | 0.04648649 |
| 30 | 18 | 0.08809524 |
| 31 | 18 | 0.03057143 |
| 32 | 18 | 0.07263158 |
| 33 | 19 | 0.01893617 |
| 34 | 19 | 0.03319149 |
| 35 | 19 | 0.03312500 |
| 36 | 19 | 0.02925000 |
| 37 | 19 | 0.03276596 |
| 38 | 19 | 0.04714286 |
| 39 | 19 | 0.03725000 |
| 40 | 19 | 0.04063830 |
| 41 | 20 | 0.03933333 |
| 42 | 20 | 0.04808511 |
| 43 | 20 | 0.03191489 |
| 44 | 20 | 0.06421053 |
| 45 | 20 | 0.05476190 |
| 46 | 20 | 0.03312500 |
| 47 | 20 | 0.04171429 |
| 48 | 20 | 0.03680851 |
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