It Is Known That the Variance of a Population Equals

question 49

Essay

It is known that the variance of a population equals 576.A random sample of 144 observations is going to be taken from the population.
a.
With a .95 probability, what statement can be made about the size of the margin of error?
b.
With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 6 or less?

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Definitions:

Cultural Variations

Differences in practices, beliefs, and values among cultures, affecting behaviors, traditions, and ways of life.

Eyebrow Raising

A nonverbal form of communication indicating surprise, skepticism, or interest.

Greeting

A polite word or sign of welcome or recognition addressed to a person upon arrival or introduction.

Subjective Well-being

An individual's self-perceived happiness or satisfaction with life, used as a measure of psychological health.