Term
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Definition
| when we estimate the standard deviation of a sampling distribution using statistics found from the data, the estimate is called a standard error |
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Term
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Definition
| a level C confidence interval for a model parameter is an interval of values usually of the form estimate +/- margin of error found from data in such a way that C% of all random samples will yield intervals that capture the true parameter value |
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Term
| One-proportion z-interval |
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Definition
| a confidence interval for the true value of a proportion; the CD is p-hat +/- z*SE(p-hat), where z* is a critical value from the Standard Normal model corresponding to the specified confidence level |
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Term
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Definition
| in a confidence interval, the extent of the interval on either side of the observed statistic value is called the margin of error; it is typically the product of a critical value from the sampling distribution and a standard error from the data; a small ME corresponds to a CI that pins down the parameter precisely |
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Term
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Definition
| the number of standard errors to move away from the mean of the sampling distribution to correspond to the specified level of confidence |
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