A Scientist Is Hoping to Compare the Mean Levels of DDT

question 66

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) 1
• B) 50
• C) 6
• D) 3

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Definitions:

Dog Food

Food specifically formulated and intended for consumption by dogs, containing nutrients necessary for their health and well-being.

Desensitization Therapy

A therapeutic technique used to reduce phobias and anxieties by gradually exposing the patient to the feared object or situation in a controlled manner.

Classical Conditioning

The approach of training through the habitual pairing of two stimuli; originally, the second stimulus induces the response, which later is induced by the first stimulus solely.

Extinction

In psychology, the diminishing of a conditioned response, typically when the reinforcement or stimulus that originally led to the response is removed.