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Data Analysis
Data Analysis
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1
Frage 41
True
False
2
Post hoc test in ANOVA are applied to:
Test which groups differ on the dependent value
Test which groups are equal regarding the independent variable
Test for homogeneity of variance
Test which groups differ in terms of their variance
3
Frage 14
Factorial ANOVA
Simple regression analysis
ANCOVA
Partial correlation analysis
4
Frage 35
False
True
5
Which of the following statistics will more likely be affected the LEAST by the inclusion or exclusion of an outlier?
Variance
Standard diviation
Mean
Mode
6
Other things being equal, as the sample size increases, the effect size also Increases.
False
True
7
Frage 31
True
False
8
Frage 27
Multiple regression analysis
Factorial ANOVA
ANCOVA
Multiple logistic regression analysis
9
Frage 52
Disagree
Agree
10
Frage 1
Fail to reject the null hypothesis, making a Type 2 error
Reject the null hypothesis, making a Type 1 error
Reject the null hypothesis, finding a true positive effect
11
Frage 22: Thomas concludes from his sample that celebrity advertising ....
... has a pos effect on sales when in the pop it does not
... has a neg effect in sales which is also true to the pop
... has no effect on sales when in the population it does
... has a pos effect on sales when this effect is also true in the pop
12
Other things being equal, the 99% confidence interval (CI) for an estimate in a given sample will be:
Narrower than the 95% CI
Wider than the 95% CI
13
Frage 51
False
True
14
Frage 5
Celebrity endorsements no effect in sample but effective in pop
Expert testimonials beat celebrity endorsements & is true in pop
Expert testimonials beat celebs in sample but not in pop
Expert testimonials decrease ad effectiveness & is true in pop
15
The standard deviation is a measure of how well a given statistic (e.g mean) represents the sample.
True
False
16
The standard error of a statistic will always be smaller than its standard deviation.
False
True
17
Logistic regression is special in that it can:
Include categorical covariates
Control for a third variable
Test for group differences
Predict group membership
18
With 99% confidence level, when would it be correct to not reject the null hypothesis H
0
?
When the resulting test has a p > 0.05
When the resulting test has a p < 0.01
19
Frage 39
True
False
20
Frage 17: A unit increase in satisfaction increases...
The odds of recommendation by 70%
The odds of recommendation by 0.50
The probability of recommendation by 70%
The probability of recommendation by 50%
21
Frage 4
C
B
D
A
22
Frage 56
False
True
23
Frage 45
False
True
24
Frage 50
False
True
25
With 99% confidence level, when would it be correct to not reject the null hypothesis H
0
?
When the resulting test has a p < 0.01
When the resulting test has a p > 0.01
26
Post-hoc tests in ANOVA are applied to:
Test which groups are equal regarding the independent variable
Test for homogeneity of variance
Test whether the variances across groups are different
Test which groups differ in the dependent variable
27
Statistical power is the opposite of the probability making a Type 1 error
False
True
28
Other things being equal, the size of the population increases the statistical power of a test.
True
False
29
The p-value of a test indicates how likely it is that the results we obtained are due to chance.
True
False
30
Cronbach’s alpha is useful to:
Evaluate the association between dependent and independent variables
Evaluate heteroscedasticity
Test causality between related variables
Test the internal consistency of multi-items measures
31
Frage 48
True
False
32
Validity is the measurement of a variable that cannot be influenced by systematic error, if random error is zero.
True
False
33
Frage 20: A unit de-/increase in satisfaction increases the
... increase ... the probability of recommendation by 60%
... decrease ... the odds of recommendation by 40%
... increase ... the odds of recommendation by 82%
... increase ... the probability of recommendation by 82%
34
Frage 30
False
True
35
A partial correlation analysis is used when:
A control variable is unrelated with two focal variables
Variables of independent groups are correlated
At least one of the variables is not continuous
A third variable is associated with two other variables
36
Frage 40
False
True
37
Frage 55
False
True
38
Frage 6
Independent samples t-tests
Chi square test
One way ANOVA
Paired samples t-test
39
With 99% confidence level, when would it be correct to not reject the null hypothesis H
0
?
When the resulting test has a p > 0.05
When the resulting test has a p < 0.05
40
What information is provided by the squared correlation coefficient R
2
?
The partial correlation
(A) and (C) are correct
The spread of the data
The amount of shared variance
41
Frage 16
It is not falsifiable
It is an experimental hypothesis
It is an exploratory hypothesis
It implies a one tailed test
42
Frage 42
False
True
43
Logistic regression is special in that it can:
Include binary predictors
Predict group membership
Test for group differences
Control for a third variable
44
A careful examination of the standardized residuals in regression analysis CANNOT be used to identify:
Outliers
Multicollinearity
Heteroscedasticity
Normality of errors
45
Frage 56
False
True
46
What information is provided by the R
2
squared correlation coefficient?
The partial correlation
The amount of shared variance
Only (A) and (C) are correct
The spread of the data
47
Which of the following measurement scales cannot have the property of a natural rank order?
Interval
Ratio
Ordinal
Nominal
48
Frage 23
Paired samples t-test
Independent samples t-test
One way ANOVA
Chi2 test
49
Frage 3
D
C
A
B
50
The statistical power of a test does not depend on the effect size.
False
True
51
Frage 15
Perceived product prestige enhances the influence of ethnocentrism
The effect of ethnocentrism weakens as perceived product prestige increases
Ethnocentrism eliminates the influence of perceived product prestige
Perceived product prestige eliminates the influence of ethnocentrism
52
Cronbach’s alpha is useful to:
Test the internal consistency (i.e. reliability) of multi-item measures
Evaluate the association between a dependent and an independent variable
Test causality between variables
Compare independent groups on a continuous scale
53
Frage 9
Paired samples t-test
Independent samples t-test
One way ANOVA
Chi squared test
54
Frage 49
True
False
55
Validity in the measurement of a variable cannot be influenced by systematic error, if random error is zero.
False
True
