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【简答题】
如果类B继承了类A,则称类A为类B的基类,类B称为类A的【1】。
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【简答题】一种燃料的辛烷等级服从正态分布,其平均等级为98.0,标准差为0.8,现从一批新油中抽出25桶,算得样本均值为97.7。假定标准差与原来一样,问新油的辛烷平均等级是否比原来燃料的平均等级偏低。(α=0.05)
【简答题】钢制车身面板缩火条件是( )
【多选题】Which TWO of the fo llowing statements relating to internal and external auditors are correct?
A.
Internal auditors are required to be members of a professional body
B.
The internal auditors' scope of work should be determined by those charged with governance
C.
External auditors address their auditor's report to those charged with governance
D.
Internal auditors can never be independent of the company
E.
Internal auditors should implement any changes to internal controls that the recommend
F.
External auditors may assess the effectiveness of a client's internal controls as part of the audit process
【简答题】一种燃料辛烷等级服从正态分布，其平均等级为98，标准差为0.8，今从一批新燃料中随机抽取25桶，算得样本均值为97.7，假定标准差与原来一样，问：新燃料的辛烷平均等级是否比原燃料辛烷的平均等级偏低(α=0.05)?
【简答题】一种燃料辛烷等级服从正态分布，其平均等级为98，标准差为0.8，今从一批新燃料中随机抽取25桶，算得样本均值为97.7，假定标准差与原来一样，问：新燃料的辛烷平均等级是否比原燃料辛烷的平均等级偏低(α=0.05)?
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