A Scientist Is Hoping to Compare the Mean Levels of DDT

question 63

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. Identify the response variable in this study.

• A) The three fish species
• B) The amount of DDT in a fish
• C) The scientist
• D) The number of fish

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Definitions:

Intracellular

Occurring within or inside a cell, affecting the cell's internal environment or processes.

Neurotransmitters

Chemicals that transmit signals across a synapse from one neuron to another in the nervous system.

Synapse

The junction between two neurons, where nerve impulses are transmitted from one to the other.

Sodium

A chemical element, symbol Na, that is a highly reactive metal and an essential mineral for living organisms.