At Time One, 50 Butterflies Were Captured and Marked with Paint

question 40

Multiple Choice

At time one, 50 butterflies were captured and marked with paint. Two days later, 100 were captured and 10 were previously marked. What is the estimated population size?

• A)100
• B)500
• C)1000
• D)5000
• E)10,000

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Definitions:

Digital Rectal Exam

A manual examination performed by inserting a lubricated, gloved finger into the rectum to check for abnormalities of organs or other structures in the pelvis and lower belly.

Specificity

In diagnostic testing, the ability of the test to correctly identify those without the disease.

Positive Predictive Value

The probability that individuals with a positive test result actually have the disease.

Specificity

The ability of a test to correctly identify those without the disease or condition being tested for.