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Concept explainers
To describe a real world situation in which it would be useful to use a sample mean to help the population mean estimation and also describe how one can collect a random sample from this population.
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Answer to Problem 26HP
Sample mean is used to help the estimate of population mean because one cannot contact every eligible voter and get their opinion on a nationwide election. And one can collect a random sample from this population when a stratified random sample is used to call 100 people throughout the country.
Explanation of Solution
Given information:
While the population mean is more accurate, it will often not be feasible to collect every value in the population. Sample means should be used as an estimate for population like these. For example, one cannot contact every eligible voter and get their opinion on a nationwide election.
Random sample can be collected from this population when poll of the voters is required to determine if a particular presidential candidate is favored to win the election. A stratified random sample is used to call 100 people throughout the country.
Chapter 12 Solutions
Algebra 1
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