# 有沒有人能幫幫忙~數學統計問題2:

請高手幫幫忙~Q6:Ifσ is unknown, and n<20, the confident interval for μ is based on the A) t-distributionB) normal distribution C) binomial distribution D) Poisson distribution Q7:A 95% confidence interval for μ can be interpreted to mean that if we take 100samples of the same size and construct 100 such confidence...
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請高手幫幫忙~Q6:Ifσ is unknown, and n<20, the confident interval for μ is based on the A) t-distributionB) normal distribution C) binomial distribution D) Poisson distribution Q7:A 95% confidence interval for μ can be interpreted to mean that if we take 100samples of the same size and construct 100 such confidence intervals for μthena) 95will include μ b) 95will include Χ (Χ上面有一劃) c) 95will not includeμd) Thereis a 95% probability that each interval containsμ Q8:each of a sample of 40 loaves of bread is weighted and the mean weight is foundto be 896gm, with s = 13 gm. A 99% confidence interval for μis (890.7,901.3).it follows thata) Weare 99% confident that the mean weight of the population lies within thisintervalb) Thereis a 99% chance that the mean weight of all bread loaves falls within thisintervalc) Theprobability is 0.99 that the mean weight of any sample of 40 loaves will bewithin 5.3gm of the population meand) Both(A) and (C) are correct Q9:for the sample data: 0, 2, 3, ,3, 5, 7, 10, 4, 12, 13, if the sample mean isused to estimate the population mean, the number of degrees of freedom isa) 1,because the sum of sample values equals 59b) 10,because we can determine the sample meanc) 10,because all 10 values are already specifiedd) 9,because the sum of sample values must equal 59 Q10:In general, calculating confidence limits when the sample is large andpopulation parameters are not all know results in a) Lengtheningof the confidence intervalb) Estimationof standard errorc) Calculationof the standard errord) Reductionof the confidence level

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