急 ! F6 數學統計學?
回答 (1)
2015-09-16 1:19 pm
(1)
Median = (5 + 5)/2 = 2
1st Q = 4
3rd Q = 7
IQR = (10 - 3)/2 = 3.5
(2) Xbar,Ybar = ?; Sx,Sy = ?
Xbar = (3+3+4+4+5+5+6+7+8+10)/10 = 5.5
Ybar = (6+7 +2+8+2+4+3+5+3+2)/10 = 4.2
Sx = √[(9+9+16+16+25+25+36+49+64+100)/10 - 5.5^2] = 2.156385865
Sy = √[(36+49+4+64+4+16+9+25+9+4)/10 - 4.2^2] = 2.088061302
(3) Which one is more dispersed?
X range = 10 - 3 = 7
Y range = 8 - 2 = 6
Thus X is more dispersed!!
(4) Recommend?
Z = (Xbar - Ybar)/√[(Sx^2 + Sy^2)/(n-1)]
= 1.3/√[(4.65+4.36)/9]
= 0.144 < Z(95%) = 1.96
= Effect of drug are not obvious.
No!!
Median = (5 + 5)/2 = 2
1st Q = 4
3rd Q = 7
IQR = (10 - 3)/2 = 3.5
(2) Xbar,Ybar = ?; Sx,Sy = ?
Xbar = (3+3+4+4+5+5+6+7+8+10)/10 = 5.5
Ybar = (6+7 +2+8+2+4+3+5+3+2)/10 = 4.2
Sx = √[(9+9+16+16+25+25+36+49+64+100)/10 - 5.5^2] = 2.156385865
Sy = √[(36+49+4+64+4+16+9+25+9+4)/10 - 4.2^2] = 2.088061302
(3) Which one is more dispersed?
X range = 10 - 3 = 7
Y range = 8 - 2 = 6
Thus X is more dispersed!!
(4) Recommend?
Z = (Xbar - Ybar)/√[(Sx^2 + Sy^2)/(n-1)]
= 1.3/√[(4.65+4.36)/9]
= 0.144 < Z(95%) = 1.96
= Effect of drug are not obvious.
No!!
收錄日期: 2021-04-18 00:15:41
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https://hk.answers.yahoo.com/question/index?qid=20150915180446AAZqiOE