The Class Mark Is the _________, and It Is _________

question 22

Multiple Choice

The class mark is the _________, and it is _________.

• A)total number of class intervals in a frequency distribution; usually between 5 and 15
• B)range of the observed values; the difference between the max and min values
• C)width of the class intervals; approximately equal to the range divided by the number of classes
• D)midpoint of each class interval; geometric mean of the class interval endpoints
• E)midpoint of each class interval; arithmetic mean of the class interval endpoints

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Definitions:

Polygraph

An instrument that measures multiple physiological responses, such as blood pressure, pulse, and respiration, used to infer truths or falsehoods in a person's statements.

Blood Sugar Level

The concentration of glucose present in the blood, which is a critical indicator of metabolic health and is regulated by hormonal controls.

Hormone Secretions

The process by which endocrine glands produce and release hormones into the bloodstream to regulate the body's functions.

Pupil Dilation

The process by which the pupil, the circular opening in the center of the eye's iris, increases in size to allow more light to enter the eye.