6.設有x與y兩組數據如下表,已知x的算術平均數=2,x與y的相關係數為0.5,
則數對(a,b)為 (2,3)
sat4b+3
4-4-15²-11
My = 4 = 4
r= 5xy
Bore Buy
5x4+ 3+8+56+4578
Sxx= 1+4+0²+b²-16
50+4+3 = 0.5√20²+25-22
=a+b²-11 252 +45 +30= +120²+26=2
Suy = 9+16+25+16-64 250+Ya+za+++--
=
2
Sa+4+35
5a²+foab+bon=ath²-11
49Q²
x
1
2
a
b
y
3
4
5
4
-(x-2)
= 50+45+3
29425²-20
7.
已知二維數據(ai,bi)的相關係數 06.口
this b- To 12 ab
15: *
3 1
za²+25=5a-45-25=0
