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6 Cards in this Set
- Front
- Back
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To estimate an unknown BLANK , start with a statistic that provides a BLANK guess. The chosen statistic is a BLANK for the BLANK. The specific value of the point estimator that we use gives a BLANK for the parameter. |
population parameter, reasonable, point estimator, parameter, Point Estimate |
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confidence interval |
uses sample data to estimate an unknown population parameter with an indication of how precise the estimate is and of how confident we are that the result is correct . |
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Any confidence interval has two parts: an BLANK and a BLANK. The interval has the form BLANK. When calculating a confidence interval, it is common to use the form BLANK. |
interval computed from the data, confidence level C. estimate +- margin of error, (statistic) +-(critical value) multipled by standard deviation of statistic. |
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The confidence level C is: |
the success rate of the method that produces the interval. |
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the margin of error of a confidence interval gets smaller as : |
the confidence level C decreases the sample size n increases |
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Before you calculate a confidence interval for a population mean or proportion, be sure to check conditions: BLANK sampling or random assignment, BLANK sampling distribution and BLANK observation. Remember the BLANK for a confidence interval includes only chance variation no other sources of error like nonresponse and undercoverage. |
Random, Normal, Independent, margin of error |
