(
鍗曢�夐
)1:
棰橀潰瑙佸浘鐗?/p>
A: A
B: B
C: C
D: D
姝ｇ‘绛旀
:
(
鍗曢�夐
)2:
鑷�讳綋
X
鎶藉緱涓�涓閲忎负
5
鐨勬牱鏈?/p>
8,2,5,3,7,
鍒欐牱鏈潎鍊兼槸
A: 8
B: 2
C: 5
D: 3
姝ｇ‘绛旀
:
(
鍗曢�夐
)3:
鑷�讳綋
X
鎶藉緱涓�涓閲忎负
5
鐨勬牱鏈?/p>
8,2,5,3,7,
鍒欐牱鏈柟宸槸
A: 6
B: 6.5
C: 7
D: 7.5
姝ｇ‘绛旀
:
(
鍗曢�夐
)4:
瀵逛簬闅忔満鍙橀噺
X
锛?/p>
Y
锛屼笅鍒楀悇寮忎腑閿欒鐨勬槸锛堬級
銆?/p>
A: cov(X,Y)=cov
锛?/p>
Y
锛?/p>
X
锛?/p>
B: cov
锛?/p>
2X
锛?/p>
Y
锛?/p>
=2cov
锛?/p>
X
锛?/p>
Y
锛?/p>
C: cov
锛?/p>
X
锛?/p>
X
锛?/p>
=D
锛?/p>
X
锛?/p>
D: D
锛?/p>
3X
锛?/p>
=3D(X)
姝ｇ‘绛旀
:
(
鍗曢�夐
)5:
瀵逛簬闅忔満鍙橀噺
X
锛?/p>
Y
鏈?/p>
D
锛?/p>
X
锛?/p>
=4
锛?/p>
D
锛?/p>
Y
锛?/p>
=9
锛?/p>
cov(X,Y)=0.6,
鍒欑浉鍏崇郴鏁?/p>
蟻xy=
锛堬級
銆?/p>
A: 0.6
B: 0.1
C: 0.2
D: 0.9
姝ｇ‘绛旀
:
(
鍗曢�夐
)6:
棰橀潰瑙佸浘鐗?/p>
A: A
B: B
C: C
D: D
姝ｇ‘绛旀
:
(
鍗曢�夐
)7:
棰橀潰瑙佸浘鐗?/p>