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:

Infant

A very young child or baby, typically from birth until 12 months of age.

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A decrease in response to a stimulus after repeated presentations, illustrating one of the simplest forms of learning.

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Toys infused with chamomile scent, often used to soothe and relax children due to the calming properties of chamomile.

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A topical preparation intended to protect, heal, or soothe the skin.