[email protected] 12/10/2011
n
ii
XX
n==
1
/
n
n n
x n
x xn
+
+
= +
12
1 21
2 2
2
50% (50 2 [Q2])
/
n
n n
x n
x xn
+
+
= +
12
1 21
2 2
2 (n=5): 1, 3, 10, 15, 18
=10
(n=8): 2, 5, 6, 9, 10, 17, 20, 23
= (9+10)/2 = 9,5
( )x x x+
= =5 1 6 3
22
( )x x
= =8 42
9 ( ) ( )x X X+ +
= = =58 4 112
10
.. 1, 1, 2, 3, 3, 3, 4 3 3, 3, 3, 6, 8, 10, 15, 15, 15 3, 15
(pmol/l) 11 :
66 72 79 84 102 169 414 144 123 110 162
,X + + + + + + + + + += = 66 72 79 84 102 169 414 144 123 110 162 1525 138 6411 11
: 66 72 79 84 102 110 123 144 162
169 414
110 pmol/l
( )nx x x+ +
= =1 11 1 62 2
(kg/m2) 40 35 30 25 20 15
30
20
10
0
= =
< <
< <
=
( ) = 75 25 = Q3 Q1
( )n
ii
X XS
n=
=
22 1
1
( )n
ii
X XS
n=
=
21
1
(SD)
(Range)
2
2
(IQR)
50%
(IQR)
4 IQR (interquartile range) = Q3 Q1
( ) ( )n nIQR x x
+ +
= 3 11 14 4
(boxplot)
45
40
35
30
25
20
15
10
Q3
Q2
Q1
IQR
IQR
(k
g/m
2 )
(pmol/l) 11 :
66 72 79 84 102 169 414 144 123 110 162
,X =138 6
xi 66 72 79 84 102 169 414 144 123 110 162
138,6
138,6
138,6
138,6
138,6
138,6
138,6
138,6
138,6
138,6
138,6
-72,6
-66,6
-59,6
-54,6
-36,6
30,4
275,4
5,4
-15,6
-28,6
23,4
5270,8
4435,6
3552,2
2981,2
1339,6
924,2
75845,2
29,2
243,4
817,9
547,6
ix x
x
( )ix x2
( ), , pmol/l
n
ii
X XS
n=
= = =
21 95986 56 97 97
1 10
xi 66 72 79 84 102 169 414 144 123 110 162
xi 1525
(xi)2 2325625
xi2 4356 5184 6241 7056 10404 28561 171396 20736 15129 12100 26244
xi2
307407
( )
, pmol/l
=
=
= = =
n
ini
ii i
XX
nSn
2
2 1
1
232562530740711 97 97
1 10
: 66 72 79 84 102 110 123 144 162
169 414
= 414 66 = 348
Q1= x (n+1)*1/4 = x (11+1)*1/4 = x (3) = 79 Q3= x (n+1)*3/4 = x (11+1)*3/4 = x (9) = 162
E = 162 79 =83 66 72 79 84 102 110 123 144 162 169 414 Q1 Q2 Q3
66 72 79 84 102 110 123 144 162 169 414
138,6 111,1 pmol/l 110 106 pmol/l 97,97 37,39 pmol/l 348 103 pmol/l IQR 83 71.25 pmol/l
Slide Number 2 (SD) (Range) (IQR) (IQR) (boxplot)
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