Questions & Answers
Browse all 25 questions from the
Natural Statistics and Wildlife Probability study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
In a population of honeybees, the foraging range follows a distribution where the mean distance from the hive is approximately 2 to 3 kilometers. What statistical term describes the most frequently occurring value in this distance dataset?
-
A
Mean
-
B
Median
-
C
Mode
-
D
Standard Deviation
2
If a biologist tags 50 sea turtles in a bay and later recaptures 200, finding 10 with tags, what is the estimated total population size using the Lincoln-Peterson index formula?
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A
500
-
B
1,000
-
C
2,000
-
D
2,500
3
The gestation period of African elephants has a normal distribution. If the mean is 660 days with a standard deviation of 15 days, what percentage of births fall within one standard deviation of the mean?
-
A
68%
-
B
95%
-
C
99.7%
-
D
50%
4
When calculating the probability of a bird species carrying a specific genetic mutation in a population where 1 in 50 individuals is affected, what is the probability that a randomly selected individual does NOT carry the mutation?
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A
0.02
-
B
0.98
-
C
0.05
-
D
0.95
5
In a forest ecosystem, the frequency of tree heights often follows a specific statistical curve. Which distribution is most commonly used to model the number of occurrences of rare events, such as the sighting of a specific nocturnal predator in an hour?
-
A
Normal
-
B
Poisson
-
C
Binomial
-
D
Exponential
6
If the probability of a sea lion pup surviving its first year is 0.75, what is the probability of two independent pups both surviving their first year?
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A
0.5625
-
B
1.50
-
C
0.25
-
D
0.80
7
Which statistical measure represents the square root of the variance in the annual rainfall data of the Amazon rainforest?
-
A
Range
-
B
Mean
-
C
Standard Deviation
-
D
Interquartile Range
8
In a study of 100 emperor penguins, 60 were male and 40 were female. What is the probability of selecting a female penguin at random?
9
The lifespan of a certain species of wildflower follows an exponential distribution. In this type of probability distribution, what is the relationship between the mean and the standard deviation?
-
A
Mean equals standard deviation
-
B
Mean is double the standard deviation
-
C
Mean is half the standard deviation
-
D
They are unrelated
10
If a coral reef survey shows that the number of fish species present increases logarithmically with the area sampled, which statistical relationship is being observed?
-
A
Linear regression
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B
Species-area relationship
-
C
Normal distribution
-
D
Chi-square test
11
In a sample of 200 butterflies, the wingspans are measured. If the mean wingspan is 50mm and the median is 50mm, what does this suggest about the distribution of the data?
-
A
It is heavily skewed
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B
It is perfectly symmetrical
-
C
It is bimodal
-
D
It has high outliers
12
What is the probability of picking an egg that will hatch into a female alligator if the sex ratio of the clutch is 1:1?
-
A
0.25
-
B
0.5
-
C
0.75
-
D
1.0
13
When researchers study the biodiversity of a soil sample, they use the Shannon Diversity Index. What does a higher value in this index statistically represent?
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A
Lower species count
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B
Higher species richness and evenness
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C
Decreased environmental stability
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D
A smaller sample size
14
If a population of wolves has a growth rate that is constant over time, which type of function best represents the total population size over years?
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A
Linear
-
B
Exponential
-
C
Logarithmic
-
D
Inverse
15
In a data set of 1,000 birds, 250 are migratory. What is the relative frequency of migratory birds in this population?
-
A
0.025
-
B
0.25
-
C
2.5
-
D
25
16
Which statistical test is commonly used to compare the observed frequencies of animal diet choices against expected frequencies based on prey availability?
-
A
T-test
-
B
Chi-square test
-
C
ANOVA
-
D
Correlation coefficient
17
The body mass of a species of lizard is found to have a coefficient of variation of 10%. If the mean mass is 200g, what is the standard deviation?
18
When tracking the migration path of a whale, the distance covered per day fluctuates. What statistical measure would best indicate the 'typical' daily distance while minimizing the effect of extreme outliers?
-
A
Mean
-
B
Median
-
C
Range
-
D
Sum
19
In a box plot showing the distribution of nesting depths for turtles, what does the box itself represent?
-
A
The range
-
B
The interquartile range
-
C
The mean
-
D
The standard deviation
20
If there is a 5% chance that a rare orchid will bloom in a specific year, what is the probability it will NOT bloom?
-
A
0.05
-
B
0.95
-
C
0.5
-
D
0.99
21
Which term describes the data point that lies furthest from the mean in a dataset of animal migration speeds?
-
A
Mode
-
B
Outlier
-
C
Median
-
D
Quartile
22
In a population of 500 insects, 50 are predators. What is the probability of randomly choosing a non-predatory insect?
23
What is the sum of all probabilities in a sample space representing the possible weather conditions for a habitat (Sunny, Rainy, Cloudy)?
24
A researcher measures the concentration of pollutants in a stream. What statistical value is calculated by dividing the sum of all concentrations by the number of samples?
-
A
Median
-
B
Mode
-
C
Mean
-
D
Variance
25
If the correlation coefficient between local temperature and butterfly emergence date is -0.85, what does this indicate?
-
A
Strong positive correlation
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B
Strong negative correlation
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C
No correlation
-
D
Weak negative correlation
