# MATH221 Confidence Interval Concept

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MATH221 Confidence Interval Concept
Look in the newspapers, magazines, and other news sources for results of a survey or poll that…

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## MATH221 Confidence Interval Concept

MATH221 Confidence Interval Concept

Discussions Week 5 All Students Posts 68 Pages

Look in the newspapers, magazines, and other news sources for results of a survey or poll that show the confidence interval, usually shows as a +/- some amount.Â  Describe the survey or poll and then describe the interval shown.Â  How does knowing the interval, rather than just the main result, impact your view of the results?

To study applies, we would need to determine what we are measuring: weight, size, diameter, surface area, etc. To build a confidence interval we will need: statisticÂ +Â (critical value)(standard deviation).

What aspect of making a magazine better is the 54% measuring? Could we safely make decisions based on a survey that asks a reader population? How could the participation selection be made to reduce bias in the survey?…