A Random Sample of 18 Observations Is Taken from a Normal

question 3

Multiple Choice

A random sample of 18 observations is taken from a normal population. The sample mean and sample standard deviation are 76.4 and 4.2, respectively. What is an 80% interval estimate of the population variance?

• A) [12.107, 29.735]
• B) [10.870, 34.581]
• C) [12.819, 31.484]
• D) [14.636, 23.443]

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Definitions:

Brain Recognize

Refers to the complex cognitive process by which the brain identifies, decodes, and interprets stimuli or information from the environment.

Facial Expressions

Movements of the facial muscles that convey emotions, intentions, or social information to others.

Emotional Experience

The complex state of feeling resulting from psychological interactions with one's environment, often involving physiological changes.

Facial Expressions

The movements or positions of the face that convey a person's emotions, thoughts, or intentions, often universally recognized across cultures.