Katy, Tom, and Andrew are taking the behavioral ecology section of Bio 321, and they have
decided to test a hypothesis about controls over the volume of a lion’s roar. Tom hypothesizes
that a lion’s roar comes from deep in the gut, and that an underinflated lung will produce the
loudest roar. Katy on the other hand, believes that male lions achieve the loudest roar by
hyperinflating the lungs. Andrew passes on both these hypotheses and believes that a normally
inflated lung is optimal.
They don’t have a live lion to test their hypothesis, so they choose a large labmate named Felix
to be the lion, instructing him on how to underinflate, overinflate, and normally inflate his lungs
before letting out the loudest roar he possibly can. A decibel meter is set up a standard distance
from Felix, and he then lets out 15 roars (5 of each lung inflation level), which K, A, T, measure
with the decibel meter.
Step back, Felix says. “You’re gonna hear me roar!”
a. How many factors (what is it/are they?), how many levels of each factor, and how many
replicates does Rob have in this experiment?
b. What\'s wrong with their design in light of the ‘mission’ of the Biology Science Foundation
(i.e., the purpose of the project proposals requested)
c. What is the dependent variable they plan to measure?
Solution
a)only one factor is there i.e. controls over the volume of a lion’s roar by lungs hypothesis is
being analyzed
there are three levels of this factor: they are underinflated, overinflated, and normally inflated the
lung.
rob has 5 replicate of each hypothesis
b) they do not have a real lion to test their hypothesis which is wrong with their design in light of
the ‘mission’ of the Biology Science Foundation.
c) The dependent variable is the roar sound measurement using decibel meter which they
planned to measure..
Katy, Tom, and Andrew are taking the behavioral ecology section of B.pdf
1. Katy, Tom, and Andrew are taking the behavioral ecology section of Bio 321, and they have
decided to test a hypothesis about controls over the volume of a lion’s roar. Tom hypothesizes
that a lion’s roar comes from deep in the gut, and that an underinflated lung will produce the
loudest roar. Katy on the other hand, believes that male lions achieve the loudest roar by
hyperinflating the lungs. Andrew passes on both these hypotheses and believes that a normally
inflated lung is optimal.
They don’t have a live lion to test their hypothesis, so they choose a large labmate named Felix
to be the lion, instructing him on how to underinflate, overinflate, and normally inflate his lungs
before letting out the loudest roar he possibly can. A decibel meter is set up a standard distance
from Felix, and he then lets out 15 roars (5 of each lung inflation level), which K, A, T, measure
with the decibel meter.
Step back, Felix says. “You’re gonna hear me roar!”
a. How many factors (what is it/are they?), how many levels of each factor, and how many
replicates does Rob have in this experiment?
b. What's wrong with their design in light of the ‘mission’ of the Biology Science Foundation
(i.e., the purpose of the project proposals requested)
c. What is the dependent variable they plan to measure?
Solution
a)only one factor is there i.e. controls over the volume of a lion’s roar by lungs hypothesis is
being analyzed
there are three levels of this factor: they are underinflated, overinflated, and normally inflated the
lung.
rob has 5 replicate of each hypothesis
b) they do not have a real lion to test their hypothesis which is wrong with their design in light of
the ‘mission’ of the Biology Science Foundation.
c) The dependent variable is the roar sound measurement using decibel meter which they
planned to measure.
