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Research Methodology for IB mock exam
Group Statistics




Attractiveness

N

Mean

Std. Deviation

Std. Error Mean

Interest

Low

34

3,2353

1,41547

,24275

High

36

4,1111

,91894

,15316




Independent Samples Test




Levene's Test for Equality of Variances

t-test for Equality of Means

F

Sig.

t

Df

Sig. (2-tailed)

Mean Difference

Std. Error Difference

95% Confidence Interval of the Difference

Lower

Upper

Interest

Equal variances assumed

6,191

,015

-3,088

68

,003

-,87582

,28366

-1,44185

-,30978

Equal variances not assumed







-3,051

56,117

,003

-,87582

,28703

-1,45078

-,30086

One-way ANOVA



ANOVA

Interest




Sum of Squares

Df

Mean Square

F

Sig.

Between Groups

10,584

4

2,646

1,746

,151

Within Groups

98,502

65

1,515







Total

109,086

69










Pearson correlation





Correlations




Attractiveness

Interest

Attractiveness

Pearson Correlation

1

,226

Sig. (2-tailed)




,060

N

70

70

Interest

Pearson Correlation

,226

1

Sig. (2-tailed)

,060




N

70

70

Mann-Whitney test





Ranks




Attractiveness

N

Mean Rank

Sum of Ranks

Interest

Low

34

27,59

938,00

High

36

42,97

1547,00

Total

70









Test Statisticsa













Interest










Mann-Whitney U

343,000










Wilcoxon W

938,000










Z

-3,250










Asymp. Sig. (2-tailed)

,001










a. Grouping Variable: Attractiveness










Linear regression

Model Summary

Model

R

R Square

Adjusted R Square

Std. Error of the Estimate

Change Statistics

R Square Change

F Change

df1

df2

Sig. F Change

1

,226a

,051

,037

1,23388

,051

3,651

1

68

,060

a. Predictors: (Constant), Attractiveness




ANOVAa




Model

Sum of Squares

Df

Mean Square

F

Sig.




1

Regression

5,559

1

5,559

3,651

,060b




Residual

103,527

68

1,522










Total

109,086

69













a. Dependent Variable: Interest




b. Predictors: (Constant), Attractiveness




Coefficientsa

Model

Unstandardized Coefficients

Standardized Coefficients

t

Sig.

B

Std. Error

Beta

1

(Constant)

2,951

,412




7,170

,000

Attractiveness

,225

,118

,226

1,911

,060

a. Dependent Variable: Interest

Spearman rank correlation



Correlations




Attractiveness

Interest

Spearman’s rho

Attractiveness

Correlation Coefficient

1,000

,265*

Sig. (2-tailed)

.

,027

N

70

70

Interest

Correlation Coefficient

,265*

1,000

Sig. (2-tailed)

,027

.

N

70

70

*. Correlation is significant at the 0.05 level (2-tailed).

Paired samples t-test



Paired Samples Statistics




Mean

N

Std. Deviation

Std. Error Mean

Pair 1

Attractiveness

1,5143

70

,50340

,06017

Interest

3,6857

70

1,25736

,15028




Paired Samples Correlations




N

Correlation

Sig.

Pair 1

Attractiveness & Interest

70

,351

,003




Paired Samples Test




Paired Differences

t

df

Sig. (2-tailed)

Mean

Std. Deviation

Std. Error Mean

95% Confidence Interval of the Difference

Lower

Upper

Pair 1

Attractiveness – Interest

-2,17143

1,17918

,14094

-2,45260

-1,89026

-15,407

69

,000

Tables
Table 1

X X

Nominal

Ordinal

Interval

Nominal

Cross table with Chi-square test of independence






Ordinal




Spearman Rank correlation coefficient




Interval







Pearson correlation coefficient



Table 2

X Y

Nominal

Ordinal

Interval

Nominal

Cross table with Chi-square of independence

k = 2
Unrelated samples:
Wilcoxon Rank Sum test = Mann-Whitney U test
Related samples:
Wilcoxon Signed Rank Sum test


k > 2
Unrelated samples:
Kruskal-Wallis test

k = 2
Unrelated samples:
t2-test (independent samples t-test)
Related samples:
tD-test (paired samples t-test)


k > 2
Unrelated samples:
One-way ANOVA


Related samples:
Repeated measures ANOVAa

Ordinal










Interval

k = 2
Logistic regression analysisa
k > 2
Discriminant analysisa




Regression analysis

a These are more advanced techniques and are beyond the scope of present course. In other words, you do not have to use these techniques.
----------------------------------------------------------------------------------------------------------------------
You are allowed to take this sheet. The key for these MC questions will be put on Nestor.
Answers multiple choice questions exam “Research Methodology for IB”
1. 6. 11. 16.
2. 7. 12. 17.
3. 8. 13. 18.
4. 9. 14. 19.
5. 10. 15. 20.


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