A Random Sample of 20 Observations Is Selected from a Normally

question 94

Multiple Choice

A random sample of 20 observations is selected from a normally distributed population. The sample variance is 12. What is the upper limit of the 95% confidence interval for the population variance?

• A) 6.940
• B) 7.564
• C) 22.536
• D) 25.599

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Definitions:

Adrenal Glands

Small glands located on top of each kidney that produce a variety of hormones, including adrenaline and cortisol, which help regulate metabolism, immune system, blood pressure, and response to stress.

Epinephrine

A hormone and neurotransmitter also known as adrenaline, involved in the body's fight-or-flight response, increasing heart rate and blood flow.

Lymphocytes

A type of white blood cell involved in the immune response to protect the body against infections and other diseases.

Cholesterol

A waxy substance found in the blood, essential for building cells but high levels can lead to heart disease.