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Statistical estimates cannot be exact: there is a degree of uncertainty associated with any statistical estimate. A confidence interval is a range such that the estimated value belongs to the confidence interval with the stated probability.

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โˆ™ 2014-05-01 11:54:10
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Q: Why do you use confidence intervals?
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Related questions

How hypothesis testing and the use of confidence intervals are the same?

They are related but they are NOT the same.


What are the Statistics in pathology?

confidence intervals


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.


What is Confidence Intervals of Degree of Confidence?

, the desired probabilistic level at which the obtained interval will contain the population parameter.


What is meant by the term confidence intervals?

Confidence intervals represent a specific probability that the "true" mean of a data set falls within a given range. The given range is based off of the experimental mean.


What is the term used in Confidence intervals to refer to twice the margin of error?

Length


What has the author Esa I Uusipaikka written?

Esa I. Uusipaikka has written: 'Confidence intervals in generalized regression models' -- subject(s): Regression analysis, Linear models (Mathematics), Statistics, Confidence intervals


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.


In a study using 9 samples and in which the population variance is unknown the distribution that should be used to calculate confidence intervals is?

In a study using 9 samples, and in which the population variance is unknown, the distribution that should be used to calculate confidence intervals is


What are the 3 confidence intervals?

There are an infinite number of confidence intervals; different disciplines and different circumstances will determine which is used. Common ones are 50% (is the event likely?), 75%, 90%, 95%, 99%, 99.5%, 99.9%, 99.99% etc.


What is meant by a 95 percent confidence interval?

Confidence IntervalsConfidence interval (CI) is a parameter with a degree of confidence. Thus, 95 % CI means parameter with 95 % of confidence level. The most commonly used is 95 % confidence interval.Confidence intervals for means and proportions are calculated as follows:point estimate ± margin of error.


How do the confidence intervals affect a business decision?

If you are a good business man then they don't.


What is Confidence Intervals of Interval Estimate?

An open interval centered about the point estimate, .


How do you find the confidence intervals?

See: http://en.wikipedia.org/wiki/Confidence_interval Includes a worked out example for the confidence interval of the mean of a distribution. In general, confidence intervals are calculated from the sampling distribution of a statistic. If "n" independent random variables are summed (as in the calculation of a mean), then their sampling distribution will be the t distribution with n-1 degrees of freedom.


If the standard deviation is doubled what will be the effect on the confidence interval?

The confidence intervals will increase. How much it will increase depends on whether the underlying probability model is additive or multiplicative.


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.


A researcher collected 15 data points that seem to be reasonably bell shaped Which distribution should the researcher use to calculate confidence intervals?

A t-distribution with 15 degrees of freedom


What has the author William C Horrace written?

William C. Horrace has written: 'Sampling errors and confidence intervals for order statistics' -- subject(s): Costs, Econometric models, Child care, Confidence intervals, Sampling (Statistics), Federal aid to child welfare


What is Confidence Intervals of Critical Statistic?

The standard score associated with a given degree of confidence.


How do you calculate confidence interval?

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.


The t distribution is used to construct confidence intervals for the population mean when the population standard deviation is unknown?

It can be.


What has the author Dana Lester Thomas written?

Dana Lester Thomas has written: 'Confidence bands for percentiles in the linear regression model' -- subject(s): Confidence intervals


Why does margin of error increases while level of confidence increases?

The margin of error increases as the level of confidence increases because the larger the expected proportion of intervals that will contain the parameter, the larger the margin of error.


Can a line plot have intervals?

Yes, but most of the time we use intervals of 1.


How do you use intervals in a sentence?

We always go out during the INTERVALS at the movies to get a refill of popcorn.