To Compute the Necessary Sample Size for an Interval Estimate

question 24

Multiple Choice

To compute the necessary sample size for an interval estimate of a population mean, all of the following procedures are recommended when σ is unknown except​

• A) ​use the estimated σ from a previous study.
• B) ​use the sample standard deviation from a preliminary sample.
• C) ​use judgment or a best guess.
• D) use .5 as an estimate.

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Definitions:

Salivary Glands

Exocrine glands in the mouth that produce saliva, which begins the process of digestion and helps maintain oral hygiene.

Mesentery Proper

A fold of the peritoneum connecting the intestines to the posterior abdominal wall, providing support and containing blood vessels.

Serous Membrane

A thin membrane that covers internal body cavities and secretes a fluid that keeps the membrane moist; also known as serosa.

Lesser Omentum

The lesser omentum is a double layer of peritoneum extending from the liver to the lesser curvature of the stomach and the beginning of the duodenum.