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Confidence intervals may be calculated for any statistics, but the most common statistics for which CI's are computed are mean, proportion and standard deviation. I have include a link, which contains a worked out example for the confidence interval of a mean.

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โˆ™ 2009-05-10 14:15:04
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What are the brain's association areas

What is a field hockey stick made of

How old is she is rebecca stevenson

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What are the brain's association areas

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How old is she is rebecca stevenson

When during pregnancy should one quit smoking

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Q: How do you calculate confidence interval?
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Related questions

What happens to the confidence interval if you increase the confidence level?

The confidence interval becomes wider.


Why confidence interval useful?

Why confidence interval is useful


How do you calculate the confidence interval for a population mea?

It's a mystery. need detetive conan.


Does the population mean have to fall within the confidence interval?

No. For instance, when you calculate a 95% confidence interval for a parameter this should be taken to mean that, if you were to repeat the entire procedure of sampling from the population and calculating the confidence interval many times then the collection of confidence intervals would include the given parameter 95% of the time. And sometimes the confidence intervals would not include the given parameter.


The width of a confidence interval is equal to twice the value of the margin of error?

No. The width of the confidence interval depends on the confidence level. The width of the confidence interval increases as the degree of confidence demanded from the statistical test increases.


What Confidence interval is 0.05 alpha?

how are alpha and confidence interval related


What is the most controllable method of increasing the precision of or narrowing the confidence interval?

Confidence intervals represent an interval that is likely, at some confidence level, to contain the true population parameter of interest. Confidence interval is always qualified by a particular confidence level, expressed as a percentage. The end points of the confidence interval can also be referred to as confidence limits.


What happens to the confidence interval as the mean decreases?

The confidence interval is not directly related to the mean.


What happens to the confidence interval if you increase the sample size?

The confidence interval becomes smaller.


Is confidence interval and confidence limits are same thing?

no,these are not the same thing.The values at each end of the interval are called the confidence limits.


What does a confidence interval for a population mean constructed from sample data show?

A confidence interval of x% is an interval such that there is an x% probability that the true population mean lies within the interval.


What happens to the width of the confidence interval when you are unable to get a large sample size?

The width of the confidence interval increases.


Is a 95 percent confidence interval for a mean wider than a 99 percent confidence interval?

No, it is not. A 99% confidence interval would be wider. Best regards, NS


If you have constructed the confidence interval 1200.058 1448.603 and the values are in thousands is it considered to be a good confidence interval or is it too large?

---- == ==


What is the Z value for 91 percent confidence interval estimation?

The Z-value for a one-sided 91% confidence interval is 1.34


How do you calculate Confidence intervals?

Confidence intervals may be calculated for any statistics, but the most common statistics for which CI's are computed are mean, proportion and standard deviation. I have include a link, which contains a worked out example for the confidence interval of a mean.


How do you find The margin of error for the confidence interval is?

Generally speaking an x% confidence interval has a margin of error of (100-x)%.


Is it better to have a wide confidence interval or a narrow confidence interval?

Narrow because there is less of a chance for people to mess up


What is confidence associated with an interval estimate is called the?

confidence level


When the confidence interval is wider than a prediction interval?

That, my friend, is not a question.


In a confidence interval what information does the margin of error provide?

The confidence interval consists of a central value and a margin of error around that value. If it is an X% confidence interval then there is a X% probability that the true value of the statistic in question lies inside the interval. Another way of looking at it is that if you took repeated samples and calculated the test statistic each time, you should expect X% of the test statistics to fall within the confidence interval.


What happens to the confidence interval as the standard deviation of a distribution increases?

The standard deviation is used in the numerator of the margin of error calculation. As the standard deviation increases, the margin of error increases; therefore the confidence interval width increases. So, the confidence interval gets wider.


What does a 95 percent confidence interval tell you about the population proportion?

There is a 95% probability that the true population proportion lies within the confidence interval.


What is Confidence Intervals of Interval Estimate?

An open interval centered about the point estimate, .


What happens to the confidence interval as the sample estimate increases?

Assuming that other measures remain the same, as the sample estimate increases both ends of the confidence interval will increase. In effect, the confidence interval will be translated to a higher value without any change in its size.Assuming that other measures remain the same, as the sample estimate increases both ends of the confidence interval will increase. In effect, the confidence interval will be translated to a higher value without any change in its size.Assuming that other measures remain the same, as the sample estimate increases both ends of the confidence interval will increase. In effect, the confidence interval will be translated to a higher value without any change in its size.Assuming that other measures remain the same, as the sample estimate increases both ends of the confidence interval will increase. In effect, the confidence interval will be translated to a higher value without any change in its size.