Reference no: EM131402926
Snow geese feeding trial. Botanists at the University of Toronto conducted a series of experiments to investigate the feeding habits of baby snow geese (Journal of Applied Ecology, Vol. 32, 1995). Goslings were deprived of food until their guts were empty, then were allowed to feed for 6 hours on a diet of plants or Purina Duck Chow.
For each of 42 feeding trials, the change in the weight of the gosling after 2.5 hours was recorded as a percentage of initial weight. Two other variables recorded were digestion efficiency (measured as a percentage) and amount of acid-detergent fiber in the digestive tract (also measured as a percentage). The data for selected feeding trials are listed in the table below.
(a) The botanists were interested in the correlation between weight change (y) and digestion efficiency (x). Plot the data for these two variables in a scatterplot. Do you observe a trend?
(b) Find the coefficient of correlation relating weight change y to digestion efficiency x. Interpret this value.
(c) Conduct a test to determine whether weight change y is correlated with a digestion efficiency x. Use α = .01.
(d) Repeat parts b and c, but exclude the data for trials that used duck chow from the analysis. What do you conclude?
(e) The botanists were also interested in the correlation between digestion efficiency y and acid-detergent fiber x. Repeat parts a-d for these two variables.
Explain why the confidence interval for the mean value of y
: Explain why the confidence interval for the mean value of y for a particular x-value, say, xp, gets wider the farther xp is from x‾. What are the implications of this phenomenon for estimation and prediction?
|
Perform your job responsibilities
: Write a three-page essay on how your own ethics, as well as your work ethics, can directly relate to ethics in advertising as you perform your job responsibilities.
|
Explain efficacy of major types of health clinical outcomes
: Evaluate the efficacy of major types of health clinical outcomes one can use in economic evaluation analysis. Provide at least one example to support your response concerning clinical outcomes.
|
Determine the effect of pressure and temperature
: Calculate the equilibrium constant and the heat of reaction at 25 °C for this reaction. Is the reaction exothermic, or endothermic?
|
Do you observe a trend
: The botanists were interested in the correlation between weight change (y) and digestion efficiency (x). Plot the data for these two variables in a scatterplot. Do you observe a trend?
|
Find input and output voltage
: R-L-C circuit example - Find input and output voltage w.r.t. time for below circuit. R-R-L circuit - Find input and output voltage w.r.t. time for circuit shown
|
Evaluate the example of presidential leadership
: Describe the example of presidential leadership precisely, including words and deeds. Evaluate the example of presidential leadership.
|
Find and interpret the values of r
: Find and interpret the values of r and r2 for the simple linear regression relating the blood lactate concentration and the boxer's perceived recovery.
|
Estimate the shear stress
: Estimate the shear stress if the top plate is moving with a velocity ofv= 20±0.2 cm/s. Also find the uncertainty in the estimate.
|