A Researcher Wanted to Compare Eye Color Distributions of Babies

question 123

Multiple Choice

A researcher wanted to compare eye color distributions of babies born with a birth defect with babies who did not have the birth defect.26 babies with the defect were matched on gender,race,and age with 52 babies without the defect.The frequency of different eye colors as a function of the presence or absence of the defects was as follows:
Eye Color
Group Dark Medium Light
Defect 1 6 19
No Defect 15 13 24
The values entered within the table (that is,1,6,19,15,13,24) are called ____.

• A)cell frequencies
• B)marginal frequencies
• C)unit frequencies
• D)cell probabilities

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Definitions:

Psilotum

A genus of fern-like plants that belongs to one of the oldest groups of vascular plants, providing insights into the early evolutionary history of plants.

Herb

A plant with leaves, seeds, or flowers used for flavoring, food, medicine, or perfume.

Exaptation

An exaptation is a trait that initially carries out one function and is later co-opted for a new function. The original function may or may not be retained.

Tiktaalik

An extinct genus of fish-like tetrapods that represents an early stage of the transition from fish to tetrapods.