Test Pilot 2.x EDPSY 406 FINAL RLH EDPSY 406 Final Exam ŒWe are lucky to have part of the validity data for the WISC-III available. Use this data set, and Statlets to solve the following problems. WHITE Helvetica,Arial 4 BLACK 7 1
L ™Is the following augmented model significantly better than the compact model. MODELA: LISTEN = VIQ +PIQ + VIQ^2 MODELC: LISTEN = VIQ + PIQ çYes
No
Yes No 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ‚Sorry this is not significant. Hope you used the multiple regesssion program, and put this additional variable last in the model. -4 points awarded for selecting No
V Which of the following F statistics would you report for the problem above? ³F = 22.61, df = 1,33,
F = 0.43, df = 1, 96
F = 88.88, df = 1, 96
F = 10.26, df = 2,95
F = 22.61, df = 1,33, F = 0.43, df = 1, 96 F = 88.88, df = 1, 96 F = 10.26, df = 2,95 0 4 0 0 ?4 points awarded for selecting F = 0.43, df = 1, 96
` ŒWhich of the following statements is correct concerning the problem above? We are testing a main effect of VIQ.
We are testing a main effect of PIQ
We are testing an interaction between VIQ and PIQ.
We are testing an interaction between VIQ and itself.
We are testing an interaction between PIQ and itself.
$We are testing a main effect of VIQ. #We are testing a main effect of PIQ 2We are testing an interaction between VIQ and PIQ. 5We are testing an interaction between VIQ and itself. 5We are testing an interaction between PIQ and itself. 0 0 0 4 0 `4 points awarded for selecting We are testing an interaction between VIQ and itself.
j “Is the following augmented model significantly better than the compact model? MODELA: LISTEN = VIQ + PIQ + VIQ*PIQ MODELC: LISTEN = VIQ + PIQ çYes
No
Yes No 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -4 points awarded for selecting No
t Which of the following F statistics would you report for the problem above? ªF = 0.0, df = 1,96
F = 88.88, df = 1, 96
F = 88.88, df = 2, 95
none of these
F = 0.0, df = 1,96 F = 88.88, df = 1, 96 F = 88.88, df = 2, 95
none of these 4 4 0 0 =4 points awarded for selecting F = 0.0, df = 1,96
@4 points awarded for selecting F = 88.88, df = 1, 96
~ ’Which of the following correctly defines the test in the problem directly above? ËWe are trying to determine if VIQ is a significant predictor.
We are trying to determine if PIQ is a significant predictor.
We are trying to determine if VIQ interacts with PIQ
We are trying to determine if VIQ interacts with itself.
We are trying to determine if PIQ interacts with itself.
=We are trying to determine if VIQ is a significant predictor. =We are trying to determine if PIQ is a significant predictor. 4We are trying to determine if VIQ interacts with PIQ 8We are trying to determine if VIQ interacts with itself. 8We are trying to determine if PIQ interacts with itself. 0 0 4 0 0 _4 points awarded for selecting We are trying to determine if VIQ interacts with PIQ
ˆ There are 4 separate races of children represented in this data. If you were going to use helmert contrasts to code these groups to determine if there were significant differences on VIQ between them, would this be a proper code? -3 1 1 1 0 -2 1 1 0 0 -1 1 çYes
No
Yes No 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4 points awarded for selecting Yes
’ ~How many degrees of freedom are represented in this problem? e1
2
3
4
1 2 3 4 0 0 4 0 ,4 points awarded for selecting 3
œ ÜLooking at the effect codes in the problem above, which one askes the first group's mean is significantly different from the average of group 3 and 4? µThe first code -3 1 1 1
The second code 0 -2 1 1
The third code 0 0 -1 1
None of these
The first code -3 1 1 1 The second code 0 -2 1 1 The third code 0 0 -1 1
None of these 0 0 0 4 \Sorry this one askes if the first group's mean is different that the average of 2, 3, and 4. _Sorry this one askes if the second group's mean is different from the average of group 3 and 4. NSorry this one askes if the mean of group 3 is different from that of group 4. Correct 84 points awarded for selecting None of these
¦ ›If we had another variable (Sex) and we coded males as -1 and females as +1, what would the first interaction code be using the helmert contrasts for the 4 different races. In the fill in the blank anser below, put a space between each code value (I.e., -3 1 1 1 3 -1 -1 -1). The graphic illustrates how this problem was set up by the researcher. The rows represent the different races, while the columns define males and females. The numbers inside the cells, represent the group numbers given by the researcher. I will also hand score this item to make sure that the computer does it correctly. x
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layout.gif 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 -3 -1 1 -1 1 -1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Hale fanny1 h12@psu.edu