A Population Has a Known Standard Deviation of 25

question 3

Multiple Choice

A population has a known standard deviation of 25. A simple random sample of 49 items is taken from the selected population. The sample mean (x-bar) is 300. What is the margin of error at the 95% confidence level?

• A)±8
• B)±93
• C)±7
• D)±08

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Definitions:

Metastasized

The process by which cancer cells spread from their original site to other parts of the body, establishing new tumors.

Psychological Stress

Psychological stress refers to the emotional and physical strain caused by our response to pressure from the outside world.

Physiological Stress

The body's response to a demand or challenge, which can affect physical health, such as increased heart rate and blood pressure.

Metabolic Rate

The rate at which the body uses energy while at rest to maintain vital functions such as breathing and keeping warm.