Question 483299: please help me to explain this discussin question in detail with an example....Discuss the effects that the level of confidence have on the confidence interval......my instructor says that I need to state some kind of relationship like if the interval of confidence decreases then the confidence interval get bigger or something of that nature...I am not really sure how to explain it can you please help ASAP!!!PLEASE!!!!
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Discuss the effects that the level of confidence have on the confidence interval.
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The confidence interval is ALWAYS 2*ME
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And ME = z*s/sqrt(n)
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The level of confidence determines the value of "z".
If the level increases, z must increase.
As z increases, ME must increase because ME and z are directly proportional.
As ME increases the confidence interval gets wider,
i.e. we have more confidence when the interval is
wider. We can have absolute confidence if the
interval is infinitely wide.
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Cheers,
Stan H.
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