Q10. Which of the following changes in sample size and degrees of freedom, respectively, is most likely to result in an increase in the width of the confidence interval for the population mean? Sample size Deqrees of freedom A. Increase Increase B. Increase Dccrease C. Decrease Increase D. Decrease Dccrease
答案和详解如下：
Q10.D 07Modular L1,Vol.l, PP.438-439 Study sermon 3-10.j The standard error becomes smaller as the sample sire increases. An incise in sample size increases degrees of freedom, reducing the reliability factor, A reduction in both the standard. error and the reliability factor demise the width of the confide= interval. A decease in both would increase the width.
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发表于 2007-11-5 18:37
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