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Tank Wagon Ethyl + Filling Station Ethyl 1927 - 1929
Pb in urine mgs.
Lead in Urine (Total)
1927
(exclusive of case No. 104) Pb in urine
f X fx fx2
mgs.
1929 f
x
fx
0 - .039 04 - .079 08 - .119 12 - .159 16 - .199 20 - .239 24 - .279 28 - .519 32 - .359 36 - .399 40 - .439 44 - .479 48 - .519 52 -
50 31
12 2 IS 3 8; 4 45 16 17 08 09 0 10 0 11 0 12 4 13
m
0 3 24 39 32 20 6 7 0 0 0 0 0 52 183
c3
H II
183 .= 3 .734694
49
Nu 2
=
1157 49
=
23.612244
0 3 48 117 128 100
36 49
0 0 0 0 0 676 1157
.0 .039
80
0
.04 -- .079 14 1 14
.08 -- .119 15 2 30
.12 * .159
6 3 18
.16 -- .199
24
8
.20 -- .239
3 5 15
.24 -- .279
06
0
.28 -- .319
2 7 14
50 99
NUi = 99 = 1 .980000 50
Hu 2
=
353 50
_
6.660000
(Nux)2 = 15.947939
(Nux)2 - 3.920400
fx2
0 14 60 54 32 75
0 98 333
Pi2 = 9.664505
Pi2 = 2.749600
Sigma = 3.108747 x .04 = .124350 mgs
P.E.sig
.67449 X .124550
.085875
9.899494
Sigma = 1.653192 x .04 = .066328 mgs.
. _ .67449 x .066328
-sig. -
iQ
= + .008472
= .004474
mean = 3.734694 x .04 + .02
mean 1.980000 x .04 + .02
P.E. m
.169388 mgs. Pb
.083873 7
=
+
.011982
P.E m
.099200 mgs. Pb
.044740
.044740
7.071067 = .006327
mean = .169 + .012 mgs. Pb
mean = .099 + .006 mgs.
S.D. = .124 + .008 mgs. Pb
S.D. -- .066 + .004 mgs.
Test of Difference
mean 1927 = .169 mean 1929 = .099
Diff. = .070
Diff, _ .070 _ P.E.dif. 7013
p*E*dif. - J(.012)2 + (.006) = .[^000144 + .000036
The difference is in favor of 1929 and
is beginning to be significant, i.e., 5.3 x P.E.dif<
= '1.000180
= + .013
HZ 0018103
Tank Wagon Ethyl + Filling Station Ethyl 1927 - 1929
Mgs. Pb per gm. ash
Lead in Faeces mgs./gm. Ash
1927
(excluding case No. 4.)
Mgs. Pb per
f X fx fx`
gm. ash
1929 fx
fx
0 ** .039 .04 - .079 .08 ~ .119 .12 - .159 .16 - .199 .20 - .239 .24 - .279 .28 - .519 .32 - .359 .56 -- .399 .40 - .439 .44 - .479 ,48 -
30 91 10 2
65
44 05 16 17 08 09 1 10 0 11 1 12 36
00
99 20 40 13 54. 16 64
00
6 36
7 49 00 00 10 100 00 12 144 98 496
no Na, =
1 56
2.722222
.0 - .039 .04 - .079 .08 - .119 .12 - .159 .16 - .199 .20 - .239 .24 - .279 .28 - .519 .32 - .359 .36 - .399 .40 - .439 .44 - .479 .48 - .519
.52 -
10
0
14 1 14
8 2 16
6 3 18
3 4 12
2 5 10
2 6 12
07
0
08
0
09
0
0 10
0
0 11 . 0
0 12
0
1 13
13
57 95
Hu, = 95 = 2.567568 1 57
Nu2 = .= 15.777777 2 56
Nu 2 = 32. = 11.864864 2 57
(Nux)2 = 7.410493
(Uux)2 = 6.592405
fx2
0 14 52 54 48 50 72
0 0 0 0 0 0 169 439
Pi2 ~ 6.567284
Pi2 = 5.272459
Sigma = 2.523348 x .04 = .100934 mgs
PE = >67449 x .100954 _ .063079
* 'sig.
8.485281
8.485281
= + .008023
Sigma = 2.296184 x .04 = .091847 mgs
P.E sig
.67449 x .091847 _ .059222
8.602325
8.602325
= + .006884
mean = 2.722222 x .04 + .02
mean = 2.567568 x .04 + .02
= .128888 mgs./gm. ash P.E.m = .*068079. = + .011347
= .122703 mgs./gm. ash.
P.E. = .059222 = + .009737 6.082232
mean = .129 .011 mgs./gm. ash S.D. = .101 + .008 mgs.
mean = .123 .010 mgs./gm. ash S.D. = .092 + .007 mgs.
Test of Difference
mean 1927 = .129 mean 1929 = .123
.Diff. = .006
P.E.^^ =J(.01lf + (.010)2
= 4.000121 + .000100 = J.000321
= .018
HE
Diff. - .006 x P.E.g^^- .018 The difference between the two years is certainly not significant.
0019104
Tank Wagon Ethyl + Filling Station Ethyl 1927 - 1929
Lead in Faeces (Total)
1927
1929
b in faeces
Pb in faeces
mgs.
f X fx fx2
mgs.
f X fx fx*
.0 - .079 l 0
0
.08 - .159 9 1
9
.16 - .239 6 2 12
.24 - .319 6 3 IS
.52 - .399 4 4 16
.40 - .479 4 5 20
.48 - .559 0 6
0
.56 - .639 4 7 28
.64 - .719 1 8
8
.72 - .799 0 9
0
.80 - .879
0 10
0
.83 - .959
0 11
0
.96 -1.039
0 12
0
-.04 --
1 13
IS.
36 124
N - 124 " 3. 444444 36
= 18 .888889
0
9 24
'5.4: 64 100
0 196
64 0 0 0 0
169 680
.0 - .079 3 0
0
.08 - .159 5 1
5
.16 - .239 10 2 20
.24 - .319 3 3 '9 .32 - .399 6 4 24
.40 - .479 2 5 10
.48 - .559 4 6 24
.56 - .639 2 7 14
.64 - .719 1 8
8
.72 - .799 0 9
0
.80 - .879
0 10
0
.88 - .959
0 11
0
.96 -1.039
0 12
0
1.04 -
1 13
15
37 127
Ku -l = 127 _ 5.432432 37
Nu 2 = 693 _ 18.729730 37
0 5
40 27 96 50 144 98 64
0 0 0 0
i$a_ 693
(169)
(Nux) = 11.864194
(Nux)` 11.731589
Pio = 7.024695
Pi2 = 6.948141
P.E. sig.
2.650414 x ,08 = .212033 mgs,
.67449 x .212033 .143014
8.485281
8.485281
= .016854
Sigma = 2.635933 x .08 = .210875 mgs.
P.E. sig.
.67449 x .210875 ^74*
.142233 8.602325
= + .016534
mean = 3.444444 x .08 + .04
mean = 3.452432 x .08 + .04
= .515556 mgs. P.E.j j j = --g-0-1-4-- + .023836
= .314595 mgs.
P.E.TM =
= .023385
a 6.082232
mean = .316 + .024 mgs. Pb
mean = .315 .023 mgs. Pb
S.D. = .212 + .017 mgs.
S.D. = .211 + .017 mgs.
Test of Difference
mean 1927 = .316 mean 1929 = .315
Diff. = .001
P.E.'dlf. = 4C.024)2 + (.023) = J.000576 + .000529
= 4.001105
= + .033
Diff. _ .001 <1 P*E*dif. .033 There is a slight difference in favor of 1929 but it is certainly not significant.
0019105
Tank Wagon Ethyl + Filling Station Ethyl 1927 - 1929
Lead in Urine Mgs./Liter
1927
1929
Mgs. Pb per (exclusive of case Ho. 104) Mgs. Pb per
liter urine f X fx. fx3
liter urine f X fx fx2
.0 - .039 3 0 0 0
.04 - .079 19 1 19 19
.08 - .119 'll ' 2 22 44
.12 - .159
6 3 IS 54
.16 - .199
24
8 52
.20 - .259
2 5 10 50
.24 - .279 0 6 0 0
.28 - .319 0 7 0 0
.32 - .359
18
8 64
.56 - .599
19
9 81
.40 - .439 .44. _ .479
1 10 2 11
10 100 22 242
.48 - .519 0 12 6 0
.52 -
. 1 13
13 169
49 139 855
.0 - .039 .04 - .079 .08 - .119 .12 - .159 .16 - .199 .20 - .239 .24 - .279 .28 - .519 .32 - .359 .56 - .599 .40 - .439 .44 - .479 .48 - .519 .52 -
13 0 18 1 11 2
13 24 15 16 07 18 09 0 10
1 11 0 12 1 13 50
00 18 18 22 44
39 8 32 5 25 6 36 00 8 64 00 00 11 121 00 13 169 94 518
5t
N
II
* F
II
ll
0
II H
&
= 2.836735 49 855 _ 17 448979 49 (Nux)2 = 8.047065
= 1.800000 50
Hu 2 =
= 10.360000
50
(Nux)2 = 3.240000
Pi2 = 9.401914
Sigma = 3.066254
.122650 mgs.
P.Esig.=
.67449 x 4-98
.122650
.082726 9 .899494
= .008357
mean = 2.836735 x .04 + .02
= .133469 mgs./liter
P *Em =
.082726 7
_
-XL.
vmVllTCOl O
Pi2 = 7.120000
Sigma = 2.668333 x .,04 = .106733
P.E.gig.
=
.67449
x .106733 10
= .007199
1
mean = 1.800000 x ..04 + .02
- .092000 mgs.,/liter
P.E.m = .071990 7.071067
: .010181
mean = .133 .012 mgs./lit1sr S.D* -- .123 .008
mean = .092 .010 mgs./liter S.D. = .107 + .007
Test of Difference
mean 1927 = .135
Djff,. _ .041 p .
mean 1929 = .092,
' P.E.
.016 d
Diff. ' = .041
j-----------"------------ The difference (in favor of 1929) is
p*E*dif. = n (.912) + (.010)
certainly not significant.
= 4.000144 + .000100
= X000244
= + .016
K? 0019106