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Table 9.3-1, page 369.
use http://www.ats.ucla.edu/stat/stata/examples/kirk/crf33, clear
tabdisp order b a, cellvar(y)
----------+---------------------------------------------------------
| a and b
| ------- 1 ------ ------- 2 ------ ------- 3 ------
order | 1 2 3 1 2 3 1 2 3
----------+---------------------------------------------------------
1 | 24 44 38 30 35 26 21 41 42
2 | 33 36 29 21 40 27 18 39 52
3 | 37 25 28 39 27 36 10 50 53
4 | 29 27 47 26 31 46 31 36 49
5 | 42 43 48 34 22 45 20 34 64
----------+---------------------------------------------------------
table a b, cont(sum y)
----------+-----------------
| b
a | 1 2 3
----------+-----------------
1 | 165 175 190
2 | 150 155 180
3 | 100 200 260
----------+-----------------
Table 9.3-2, page 370.
anova y a b a*b
Number of obs = 45 R-squared = 0.5690
Root MSE = 7.90569 Adj R-squared = 0.4732
Source | Partial SS df MS F Prob > F
-----------+----------------------------------------------------
Model | 2970.00 8 371.25 5.94 0.0001
|
a | 190.00 2 95.00 1.52 0.2324
b | 1543.33333 2 771.666667 12.35 0.0001
a*b | 1236.66667 4 309.166667 4.95 0.0028
|
Residual | 2250.00 36 62.50
-----------+----------------------------------------------------
Total | 5220.00 44 118.636364
Figure 9.3-1, page 371.
Note: You can download anovaplot from within Stata by typing findit anovaplot (see How can I use the findit command to search for programs and get additional help? for more information about using findit).
anovaplot, scatter(msymbol(i)) /* Figure 9.3-1 (a) */
quietly anova y a b a*b anovaplot, scatter(msymbol(i)) /* Figure 9.3-1 (b) */
Table 9.6-2, page 380.
Note: The sme command can be downloaded by typing findit contrast (see How can I use the findit command to search for programs and get additional help? for more information about using findit).
sme a b Test of a at b(1): F(2/36) = 3.7066667 Test of a at b(2): F(2/36) = 1.6266667 Test of a at b(3): F(2/36) = 6.08 Critical value of F for alpha = .05 using ... -------------------------------------------------- Dunn's procedure = 4.0941238 Marascuilo & Levin = 4.5974255 per family error rate = 4.5974255 simultaneous test procedure = 6.5295994 sme b a Test of b at a(1): F(2/36) = .50666667 Test of b at a(2): F(2/36) = .82666667 Test of b at a(3): F(2/36) = 20.906667 Critical value of F for alpha = .05 using ... -------------------------------------------------- Dunn's procedure = 4.0941238 Marascuilo & Levin = 4.5974255 per family error rate = 4.5974255 simultaneous test procedure = 6.5295994
Omega-squared computations, page 397.
Note: The omega2 command can be downloaded by typing findit contrast (see How can I use the findit command to search for programs and get additional help? for more information about using findit).
omega2 1.52 2 /* see Kirk, page 399, for formula */ omega squared = 0.0226 effect size = 0.1520 omega2 12.35 2 omega squared = 0.3353 effect size = 0.7102 omega2 4.95 4 omega squared = 0.2599 effect size = 0.5925
Table 8-14-1, page 423.
use http://www.ats.ucla.edu/stat/stata/examples/kirk/crf33a, clear
tabdisp order b a, cellvar(y)
----------+---------------------------------------------------------
| a and b
| ------- 1 ------ ------- 2 ------ ------- 3 ------
order | 1 2 3 1 2 3 1 2 3
----------+---------------------------------------------------------
1 | 24 44 38 30 35 26 21 41 42
2 | 33 36 29 21 40 27 18 39 52
3 | 37 25 28 39 27 36 10 50 53
4 | 29 27 47 26 31 46 31 36 49
5 | 43 48 34 22 45 20 34 64
----------+---------------------------------------------------------
table a b, cont(freq mean y)
----------+--------------------
| b
a | 1 2 3
----------+--------------------
1 | 5 5 5
| 30.75 35 38
|
2 | 5 5 5
| 30 31 36
|
3 | 5 5 5
| 20 40 52
----------+--------------------
SSA, page 424.
anova y a b a*b, sequential
Number of obs = 44 R-squared = 0.5844
Root MSE = 7.83536 Adj R-squared = 0.4894
Source | Seq. SS df MS F Prob > F
-----------+----------------------------------------------------
Model | 3021.13636 8 377.642045 6.15 0.0001
|
a | 187.505411 2 93.7527056 1.53 0.2313
b | 1716.21429 2 858.107143 13.98 0.0000
a*b | 1117.41667 4 279.354167 4.55 0.0046
|
Residual | 2148.75 35 61.3928571
-----------+----------------------------------------------------
Total | 5169.88636 43 120.229915
SSB and SSAB, page 425.
anova y b a a*b, sequential
Number of obs = 44 R-squared = 0.5844
Root MSE = 7.83536 Adj R-squared = 0.4894
Source | Seq. SS df MS F Prob > F
-----------+----------------------------------------------------
Model | 3021.13636 8 377.642045 6.15 0.0001
|
b | 1713.33874 2 856.669372 13.95 0.0000
a | 190.380952 2 95.1904762 1.55 0.2264
a*b | 1117.41667 4 279.354167 4.55 0.0046
|
Residual | 2148.75 35 61.3928571
-----------+----------------------------------------------------
Total | 5169.88636 43 120.229915
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