A Random Sample of Size 15 Taken from a Normally

question 214

Multiple Choice

A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal:

• A) 77.769
• B) 72.231
• C) 72.727
• D) 77.273
• E) 77.145

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Definitions:

Complained

To express dissatisfaction, discomfort, or annoyance about something.

Cycle

A sequence of events that repeat in a regular pattern.

Standards

Accepted levels of quality or achievement established by authority, custom, or common consent, used as a basis for comparison or compliance.

Punctuation

The marks, such as commas, periods, and question marks, used in writing to separate sentences and their elements and to clarify meaning.