In Early 2012,the United States Congress Approval Rating Was Approximately

question 96

Short Answer

In early 2012,the United States Congress approval rating was approximately 10% (Reuters.com).In a poll of 400 Americans,what is the probability that their approval rating is between 8% and 12%?

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Definitions:

Interval Estimation

Estimation of a population parameter with a range, or interval, of values within which one has a certain degree of confidence the population parameter falls.

Confidence Interval

A collection of numerical indicators, derived from sampling statistics, believed to contain the estimations of an obscure population parameter.

Sample Size

The number of observations or data points collected in a sample from a population for the purpose of statistical analysis.

Confidence Interval

A range of values, derived from sample data, that likely contain the population parameter with a certain level of confidence.