A Sample of 100 Production Workers Is Obtained

question 107

Multiple Choice

A sample of 100 production workers is obtained. The workers are classified by gender (male,female) and by age (under 20,20−29,30−39,and 40 or over) . How many degrees of freedom are there?

• A)0
• B)3
• C)6
• D)5

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Definitions:

Color Vision

The capacity of the visual system to identify objects by the wavelengths of light they reflect, emit, or transmit.

Cones

Photoreceptor cells in the retina of the eye that function in bright light and enable the perception of color and fine detail.

Excitation

A process that increases the likelihood or strength of a response in neural or physiological systems.

Dark Adaptation

The process by which the eyes increase their sensitivity to low levels of light.