A Sample of N = 20 Scores Has a Mean

question 25

Multiple Choice

A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?​

• A)​z = 12/20 = 0.60
• B)​z = 1.00
• C)​z = 1.50
• D)​z = 2.00

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Definitions:

Red-Green Color Blindness

A common form of color vision deficiency where individuals have difficulty distinguishing between red and green hues.

Dark Adaptation

A process by which visual receptors become maximally sensitive to dim light.

Rods

Photoreceptor cells in the retina of the eye, responsible for vision at low light levels but not for color vision.

Cones

Photoreceptor cells in the retina of the eye that function best in relatively bright light and are capable of perceiving color and fine detail.