The name is absent



26


Stata Technical Bulletin


STB-33


-----------+.

Total I
I

22

29.33

37

49.33

-----------+
16 I
21.33 I

100.00

. npt_s init

if quit”=

0, by(quit)

quit

score

obs

sum of ranks

1.0

1.0

19

793. ε

2.0

2.0

13

743.0

3.0

3.0

ιε

ε79.ε

4.0

4.0

11

244. ε

ε.o

ε.o

17

487. ε

Obs

Exp

Var

7437.ε

8322.0

79872

z =-3.

.14, chi-

squared(l) =

9.83

P>∣z∣ = 0.0017

• npt_s r-area if quit"=0, by(quit) strata(sc3)

sc3

Obs

Exp

Var

1

804.6

651.0

1953

2

1964.6

2183.0

6573.6665

3

311.0

390.0

1043.3334

Total

2780.0

3224.0

9569.9999

z

= -4.84,

chi-squared(l) =

20.60

P>∣z∣

= 0.0000

npt_s

r_area if

quif=0, by(quit)

strata(sc3 init)

sc3

init-sm

Obs

Exp

Var

1 10

195.0

234.0

316

1 20

53.5

76.0

100

1 30

6.0

6.0

0

2 10

189.5

190.0

41.666668

2 20

601.5

682.5

1181.25

2 30

54.0

60.0

13.333333

3 10

5.0

6.0

1

3 20

100.0

121.0

161.33333

3 30

41.0

52.0

60

Total

1245.5

1427.5

1874.5833

z

= -4.20,

chi-squared(l) =

17.67

P>∣z∣ = 0.0000

The second example uses Stata’s automobile dataset.

. use ∕usr∕local∕stata∕auto
(1978 Automobile Data)

Fuel consumption increases with repair record.

npt_s mpg,

by(rep78)

rep78

score

obs

sum of ranks

1.0

1.0

2

72.5

2.0

2.0

8

220.5

3.0

3.0

30

905.0

4.0

4.0

18

688.5

5.0

5.0

11

528.5

Obs

Exp        Var

8625.0

8225.0    26821.666

z = 2

.44, chi-

squared(l)

=   5.97

P>∣z∣ = 0.0146

This association is virtually all explained by the fact that foreign cars had better repair records and more efficient fuel consumption.



More intriguing information

1. On Social and Market Sanctions in Deterring non Compliance in Pollution Standards
2. Motivations, Values and Emotions: Three Sides of the same Coin
3. Effort and Performance in Public-Policy Contests
4. The name is absent
5. Monetary Policy News and Exchange Rate Responses: Do Only Surprises Matter?
6. Policy Formulation, Implementation and Feedback in EU Merger Control
7. The name is absent
8. The Global Dimension to Fiscal Sustainability
9. Rent-Seeking in Noxious Weed Regulations: Evidence from US States
10. ENVIRONMENTAL POLICY: THE LEGISLATIVE AND REGULATORY AGENDA
11. The name is absent
12. The name is absent
13. THE RISE OF RURAL-TO-RURAL LABOR MARKETS IN CHINA
14. The name is absent
15. LOCAL PROGRAMS AND ACTIVITIES TO HELP FARM PEOPLE ADJUST
16. Artificial neural networks as models of stimulus control*
17. Strategic Investment and Market Integration
18. Learning and Endogenous Business Cycles in a Standard Growth Model
19. The name is absent
20. The name is absent