问题标题:
【英语翻译①:ResidentsoftownXparticipatedinasurveytodeterminethenumberofhoursperweekeachresidentspentwatchingtelevision.Thedistributionoftheresultsofthesurveyhadameanof21hoursandastandarddeviationof6hours.T】
问题描述:

英语翻译

①:ResidentsoftownXparticipatedinasurveytodeterminethenumberofhoursperweekeachresidentspentwatchingtelevision.Thedistributionoftheresultsofthesurveyhadameanof21hoursandastandarddeviationof6hours.ThenumberofhoursthatPat,aresidentofTownX,watchedtelevisionlastweekwasbetween1and2standarddeviationsbelowthemean.WhichofthefollowingcouldbethenumberofhoursthatPadwatchedtelevisonlastweek?

②AcomputerchipmanufacturerexpectstheratioofthenumberofdefectivechipstothetotalnumberofchipsinallfutureshipmentstoequalthecorrespondingratioforshipmentsS1,S2,S3,S4combined,asshowninthetableabove.Whatistheexpectednumberofdefectivechipsinashipmentof60,000chips?

左起第一列:shipment

左起第二列:numberofdefectivechipsintheshipment

左起第三列:totalnumberofchipsintheshipment

S125,000

S2512,000

S3418,000

S4616,000

李艳娟回答:
  1.X市市民参与一项每周每人花费几个小时看电视的调查.调查结果的分布为平均数21,标准差6.X市其中一个市民Pat,上周看电视的时间低于平均数1和2个标准差之间.下面哪个数据可能是Pat上周看电视的时间?(应该为9和15之间...
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