Question Details

(solution) You have conducted an experiment examining scent-marking behavior


You have conducted an experiment examining scent-marking behavior in male red-backed salamanders (Plethodon cinereus). You have exposed different groups of males to one of four situations: (1) control, with the male alone in a cage; (2) scent cues from a female P. cinereus have been introduced to the male?s container; (3) scent cues from another male P. cinereus have been introduced to the male?s container; and (4) scent cues from a male Plethodon glutinosus have been introduced to the male?s container. You then measure the volume (in mm3) of fecal pellets left by males; these fecal pellets serve as a territory mark in these salamanders. You obtain the following results, where PC = Plethodon cinereus and PG = Plethodon glutinosus:

SUMMARY

Groups

Count

Sum

Average

Variance

Control

10

234

23.4

10.49

PC Female Cues

10

236

23.6

10.93

PC Male Cues

10

272

27.2

9.29

PG Male Cues

10

305

30.5

12.56

ANOVA

Source of Variation

SS

df

MS

F

P-value

F crit

Factor A (Cue Type)

340.88

3

113.63

10.50

<0.0001

2.87

Within Groups

389.59

36

10.82

Total

730.47

39


  • Perform a Tukey?s HSD post-hoc test to determine which means are significantly different from each other. Do this for all pairwise comparisons.
  • Construct a set of orthogonal planned comparisons to further examine the results of your experiment. Be sure to show me that you have tested the comparisons to make sure they are orthogonal!  Please show exactly how to do!!


You have conducted an experiment examining scent-marking behavior in male red-backed

 

salamanders (Plethodon cinereus). You have exposed different groups of males to one of four

 

situations: (1)...

 


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Sep 13, 2020

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