ECCB 403 Exam 1 2025 – Study Guide & Financial Systems Review
You administer medication to individuals and keep track of their symptoms/fate over time (a
record for each individual is kept.) The data are - correct answer ✔✔ Longitudinal data
The average survival rate for a population can decline when a population abundance is
increasing (assuming no immigration and emigration) - correct answer ✔✔ true
Case mortality rate (the mortality rate of people with symptoms) appears to be declining. It is
still plausible that disease is becoming worse (according to Simpson's Paradox) beceause -
correct answer ✔✔ More younger people (who previously did not develop symptoms before)
are developing symptoms and they tend to recover.
According to the figure (figure 1. on class 11 poll) which of the following is expected to make the
population to start growing? - correct answer ✔✔ 50% reduction in mortality of large juveniles
What does reproductive value measure? - correct answer ✔✔ Relative contribution of
individuals in a given stage to the future population abundance
According to the sensitivity matrix, which parameter has the most impact on the asymptotic
population growth rate? - correct answer ✔✔ a43 (look at matrix in poll 11)
What does lambda=0.95 imply? - correct answer ✔✔ The population is expected to decrease by
5% per year on average
Why does stage 2 have greater number of individuals than stage 1? (look at class 10 poll) -
correct answer ✔✔ Because stage 2 includes multiple age classes
, Why does stage 5 of loggerhead sea turtles have high relative reproductive value? (look at class
10 poll) - correct answer ✔✔ Because stage 5 have high survival rage, stages 1-3 have low
survival rate and stage 5 has high fecundity
The asymptotic population growth rate and stable stage distribution are the properties of age-
structured population, but they are not the properties of stage structured population. - correct
answer ✔✔ False
Suppose we were to conduct many experiments. In each experiment we start with the same
number of individuals in each stage and introduce two additional individuals (either 2 adults or
2 juveniles). On average, which while have the greater number of individuals in the future? -
correct answer ✔✔ Populations with two additional adults and/or populations with two
additional juveniles
Suppose the following script is run, what is displayed (value of n[3])?
n < c(3,2,4,5,20,40)
print (n[3]) - correct answer ✔✔ 4
When you start a Rstudio cloud project, you see "temporary copy". What are you supposed to
do? - correct answer ✔✔ Click "save permanent copy"
The first part of the figure caption (after figure X.) is usually - correct answer ✔✔ noun or
phrase describing what was plotted without any interpretation
If all of the per-capita rates (birth, death and developmental rate) are constant over time,
population density should change - correct answer ✔✔ exponentially with time
The number of rows of leslie matrix and the number of component of an associated population
vector must be the same - correct answer ✔✔ True
You administer medication to individuals and keep track of their symptoms/fate over time (a
record for each individual is kept.) The data are - correct answer ✔✔ Longitudinal data
The average survival rate for a population can decline when a population abundance is
increasing (assuming no immigration and emigration) - correct answer ✔✔ true
Case mortality rate (the mortality rate of people with symptoms) appears to be declining. It is
still plausible that disease is becoming worse (according to Simpson's Paradox) beceause -
correct answer ✔✔ More younger people (who previously did not develop symptoms before)
are developing symptoms and they tend to recover.
According to the figure (figure 1. on class 11 poll) which of the following is expected to make the
population to start growing? - correct answer ✔✔ 50% reduction in mortality of large juveniles
What does reproductive value measure? - correct answer ✔✔ Relative contribution of
individuals in a given stage to the future population abundance
According to the sensitivity matrix, which parameter has the most impact on the asymptotic
population growth rate? - correct answer ✔✔ a43 (look at matrix in poll 11)
What does lambda=0.95 imply? - correct answer ✔✔ The population is expected to decrease by
5% per year on average
Why does stage 2 have greater number of individuals than stage 1? (look at class 10 poll) -
correct answer ✔✔ Because stage 2 includes multiple age classes
, Why does stage 5 of loggerhead sea turtles have high relative reproductive value? (look at class
10 poll) - correct answer ✔✔ Because stage 5 have high survival rage, stages 1-3 have low
survival rate and stage 5 has high fecundity
The asymptotic population growth rate and stable stage distribution are the properties of age-
structured population, but they are not the properties of stage structured population. - correct
answer ✔✔ False
Suppose we were to conduct many experiments. In each experiment we start with the same
number of individuals in each stage and introduce two additional individuals (either 2 adults or
2 juveniles). On average, which while have the greater number of individuals in the future? -
correct answer ✔✔ Populations with two additional adults and/or populations with two
additional juveniles
Suppose the following script is run, what is displayed (value of n[3])?
n < c(3,2,4,5,20,40)
print (n[3]) - correct answer ✔✔ 4
When you start a Rstudio cloud project, you see "temporary copy". What are you supposed to
do? - correct answer ✔✔ Click "save permanent copy"
The first part of the figure caption (after figure X.) is usually - correct answer ✔✔ noun or
phrase describing what was plotted without any interpretation
If all of the per-capita rates (birth, death and developmental rate) are constant over time,
population density should change - correct answer ✔✔ exponentially with time
The number of rows of leslie matrix and the number of component of an associated population
vector must be the same - correct answer ✔✔ True
