Week 5 SPSS Prac Demo

Question 1

In a repeated measures t-test comparing Drillex and TurboDrill, what was the absolute value of the t-statistic?

A. 2.401
B. 3.498
C. 5.307
D. 1.672

Answer 1

3.498

Question 2

What is the correct number of participants in the repeated measures t-test dataset (tools.sav)?

A. 10
B. 20
C. 9
D. 12

Answer 2

10

Question 3

Which p-value was reported for the paired-samples t-test comparing drills?

A. .001
B. .007
C. .057
D. .021

Answer 3

0.007

Question 4

Which confidence interval was associated with the drill comparison?

A. .251 to 2.211
B. .38863 to 1.81137
C. -1.72 to 1.05
D. 0.62 to 2.24

Answer 4

.38863 to 1.81137

Question 5

In the one-way ANOVA for respiratory function, what were the correct degrees of freedom?

A. F(3,20)
B. F(3,23)
C. F(3,22)
D. F(2,20)

Answer 5

F(3,22)

Question 6

Which effect size was reported in the respiratory function ANOVA?

A. .062
B. .173
C. .134
D. .028

Answer 6

0.134

Question 7

Which contrast coding represents City vs the other locations in integer form?

A. 1, -1/3, -1/3, -1/3
B. 3, -1, -1, -1
C. 2, -1, -1, 0
D. 1, -1, 0, 0

Answer 7

3, -1, -1, -1

Question 8

Which statement about contrast estimates is TRUE?

A. Integer and standard form contrasts yield identical estimates
B. P-values change between integer and standard forms
C. Contrast estimates are scaled in integer form but p-values remain the same
D. Only integer forms are valid for contrasts in SPSS

Answer 8

Contrast estimates are scaled in integer form but p-values remain the same

Question 9

What is the required sum of contrast coefficients for a valid contrast?

A. 1
B. Depends on test
C. 0
D. -1

Answer 9

0

Question 10

When are contrasts considered orthogonal?

A. When they compare overlapping groups
B. When their coefficients sum to zero
C. When they are uncorrelated and form a full J-1 set
D. When they are in standard form

Answer 10

When they are uncorrelated and form a full J-1 set