Assignment #10 (2019) - Multi-factor ANOVA, multiple regression

Throughout this assignment, just get your results from the summary output. Do not use TUKEY HSD

Dataset #1 - In this dataset, you are examining how habitat type (X1) and the presence of absence of predators (X2; excluded using fences) influences bobwhite quail density (Y; Quail/hectare).

1. Run a multi-factor anova to estimate differences among groups and determine which groups are different from each other

a. Report the estimated effect of predators on quail density using the typical results statement we've been using throughout the class. Do not use TUKEY HSD

b. Report the estimated effect of habitat type on quail density using the typical results statement we've been using throughout the class. Do not use TUKEY HSD

Dataset #2 - In this dataset, you have applied one of 4 treatments: herbicide, burned, or mechanically disked to 10 clear-cuts each, plus 10 clear-cuts were not modified (control; X1). Then, 2 months after the application of the treatment, 5 plots from each treatment were planted with long-leaf pine while 5 plots from each treatment were allowed to regenerate naturally (X2). 15 years later, you examined the tree density (Y; trees/hectare) on those 40 forest plots. Do not use TUKEYHSD

1. Run a multi-factor ANOVA to test for estimate effects effects of treatment and planted/not planted on tree density.

a. Report the significance of the 'treatment' variable as a whole. In other words, what's the p-value testing whether any of the treatments are significantly different from each other?

b. Report the estimated difference between the effects of control and burn on tree density using the typical results statement we've been using throughout the class. Do not use TUKEYHSD

c. Report the estimated difference between the effects of mechanical and control on tree density using the typical results statement we've been using throughout the class. Do not use TUKEYHSD

d. Report the estimated effect of planting on tree density using the typical results statement we've been using throughout the class. Do not use TUKEYHSD

DataSet #3 - In this dataset, you are examining the effect of rodent density (x - rodents/ha) and understory cover (x - percent cover) on long-tailed weasel density (y - weasels / ha).

1. Run a multiple regression and report the estimate effects of both x variables using the standard sentences.