Answered: The ecologist studying the effects of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

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