題目是醬的 one is insterested in comparing the number of minutes of music played per hour between 4 radio stations.from a sample of 5 hours from each stations, the following sample means were offered. X1(bar)=51.6 X2(bar)=44 X3(bar)=46 X4(bar)=48.8 SST=192.8 A.complete the ANOVA table. B.at 阿法=0.05, is there a difference in the treatment mean? C.construct a 95% confidance interval for difference in mean times between station 1 and station 4? is there a difference? 以下是我的問題 我只會算給所有樣本資訊的SSB跟SST 像這樣只給平均數的要怎嚜算呢? c小題我猜是用 X1(bar)-X4(bar)服從normal分配 然後建立區間 但變異數的地方未知 母體或樣本變異數都沒資訊 這樣要怎嚜做呢? 如果不是此作法 要怎嚜解呢? 我記得anova只能用在獨立常態變異數同的母體 所以這種題目我們是否也要自行假設母體情形呢 謝謝各位大大的解答~~ --

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