Question 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?

Accepted Answer

Mode

Question 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?

Accepted Answer

1,000

Question 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?

Accepted Answer

68%

Question 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?

Accepted Answer

0.98

Question 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?

Accepted Answer

Poisson

Question 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?

Accepted Answer

0.5625

Question 7

Which statistical measure represents the square root of the variance in the annual rainfall data of the Amazon rainforest?

Accepted Answer

Standard Deviation

Question 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?

Accepted Answer

0.4

Question 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?

Accepted Answer

Mean equals standard deviation

Question 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?

Accepted Answer

Species-area relationship

Question 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?

Accepted Answer

It is perfectly symmetrical

Question 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?

Accepted Answer

0.5

Question 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?

Accepted Answer

Higher species richness and evenness

Question 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?

Accepted Answer

Exponential

Question 15

In a data set of 1,000 birds, 250 are migratory. What is the relative frequency of migratory birds in this population?

Accepted Answer

0.25

Question 16

Which statistical test is commonly used to compare the observed frequencies of animal diet choices against expected frequencies based on prey availability?

Accepted Answer

Chi-square test

Question 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?

Accepted Answer

20g

Question 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?

Accepted Answer

Median

Question 19

In a box plot showing the distribution of nesting depths for turtles, what does the box itself represent?

Accepted Answer

The interquartile range

Question 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?

Accepted Answer

0.95

Natural Statistics and Wildlife Probability

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