Stata Technical Bulletin
27
|
npt_s mpg if foreign rep7S score 1.0 1.0 2.0 2.0 3.0 3.0 4.0 4.0 ε.o ε.o z = 0.51, chi- P>∣z∣ = 0.6101 npt_s mpg if foreign rep78 score 3.0 3.0 4.0 4.0 ε.o ε.o z = 0.30, chi- P>∣z∣ = 0.7630 npt_s mpg, by(rep78) foreign 0 1 |
==0, by(rep78) 2 60.0 8 188.ε 27 648.ε 9 184.0 2 96.0 Obs Exp Var 3693.ε 3εε2.ε 6463.9i6ε squared(l) = 0.26 ==1, by(rep78) 3 28.ε 9 102.0 9 100.ε Obs Exp Var 996.0 990.0 396 squared(l) = 0.09 strata(foreign) Obs Exp Var 3693.ε 3552.6 6463.9165 996.0 990.0 396 | ||
|
— Total z = 0.67, chi- P>∣z∣ = 0.6704 |
4589.5 squared(l) |
— 4542.5 = 0.32 |
— 6859.9165 |
This can be illustrated using the dotplot graphically as follows.
. gen for = foreign
. dotplot mpg, by(rep78) s([for]) center
0 0 0
0
0 0 0
0
0
0
12 -
1 0
0
0 1 0
1
0 111 1
1
1 1 1
0 0 0
0 0 1 0 1
0 0 0
0000000
0 0 0 0 1 1
0 1 1
0 0 0
0 0
0 0 0 0
0 0
1 2 3 4 5
Repair Record 1978
Figure 1
References
Stepniewska, K. A. and D. G. Altman. 1992. snp4: Non-parametric test for trend across ordered groups. Stata Technical Bulletin 9: 21-22.
Sasieni, P. D., K. A. Stepniewska, and D. G. Altman. 1996. snp11: Test for trend across ordered groups revisited. Stata Technical Bulletin 32: 27-29.
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