2016韓國代購網 , 韓國代購化妝品 , 韓國代購批發 , 韓國代購教學---韓國代購/追加/寄貨

12位證券分析師對QUALCOMM公司2001年每股盈餘估計如下

1.27
1.37
1.4
1.4
1.4
1.4
1.42
1.45
1.48
1.49
1.55
1.63

a.計算每股盈餘估計之樣本變異數

1.在excel裡面操作

2.12筆資料鍵入A欄裡面

3.按資料功能表加以排序

4.鍵入=stdev(a1:a12)=0.091932123=S

b.計算每股盈餘估計之樣本標準差

鍵入=average(a1:a12)=1.438333333=Xbar

c.求出母體變異數及母體標準差之95%信賴區間估計值

Sigma=S/√n=0.091932123/√12=0.0265385

查雙尾表: Z(95%)=1.96

Mu=Xbar+-Z*Sigma

=1.43833+-1.96*0.0265385

=1.3863~1.49035

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