A Scientist Is Hoping to Compare the Mean Levels of DDT

question 85

Multiple Choice

A scientist is hoping to compare the mean levels of DDT toxin found in three species of fish in a local river. He randomly samples 50 of each species to use in the analysis. For each fish, he measures the amount of DDT toxin present. Ideally he will be able to rank the species based on the mean level of toxin found in each of the three species. How many factors are present in this study?

• A) 50
• B) 3
• C) 1
• D) 6

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Definitions:

Cerebrospinal Fluid (CSF)

The fluid in the subarachnoid space of the meninges and the central canal of the spinal cord.

CNS

Central Nervous System; it comprises the brain and spinal cord, controlling most functions of the body and mind.

Cerebrospinal Fluid (CSF)

A clear, colorless body fluid found in the brain and spinal cord, playing a key role in cushioning the brain and removing waste.

Nasal Conchae

Structures that extend from the lateral walls of the nasal cavity.