The larger the level of confidence used in constructing a confidence interval estimate of the population mean, the narrower the confidence interval.
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举一反三
- So-called “95% confidence interval for population mean” is applied to estimate the location of population mean, with a confidence level 95%.
- In order to construct a confidence interval estimate of the population mean, the value of the population mean is needed.
- Under<br/>a certain confidence level, with the mean as the center, the<br/>reliability range including the population average is called () A: confidence<br/>level B: degree<br/>of freedom C: precision D: confidence<br/>interval
- Which of the following statements is true? 未知类型：{'options': ['When the standard error of an estimate increases, the confidence interval for the estimate narrows down.', 'Standard error of an estimate does not affect the confidence interval for the estimate.', '', ''], 'type': 102}
- Using the confidence interval when conducting a two-tail test for the population mean we do not reject the null hypothesis if the hypothesised value for µ:
内容
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When a range of values is used to estimate a population parameter, it is called _______. A: a point estimate B: an interval estimate C: a statistical parameter D: a range estimate
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In determining an interval estimate of a population mean when σ is unknown, we use a t distribution with n - 1 degrees of freedom.
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A client may develop a high level of confidence in certain employee.
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We need a chairman ________.? who everyone has confidence of|;for whom everyone has confidence|whom everyone has confidence on|;in whom everyone has confidence
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The fraction of a sample possessing a certain trait is called a: A: proportion. B: population. C: mean. D: confidence interval.