A Random Sample of Size 15 Taken from a Normally

question 83

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. What would the upper limit of a 95% confidence interval for the population mean equal?

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

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Definitions:

Top Quintile

The highest twenty percent segment of a population sorted by income or other measurable criteria.

Bottom Quintile

The segment of a population that ranks in the lowest 20% in terms of income, wealth, or another socioeconomic metric.

U.S. Bureau of Census

The U.S. Bureau of Census is a federal agency responsible for collecting and analyzing data about the population, economy, and communities in the United States.

Negative Income Tax

A fiscal mechanism designed to provide income to individuals or families whose earnings fall below a certain level, effectively supplementing their income through a government subsidy.