Apprenticeship Evaluation Report 2024 - 2025 | Page 19

Table 7: Paired T-test, Pearson Correlation and Cohen’ s D for Confidence and Knowledge about Apprenticeships
Category
Pre Mean
Post Mean
t-Stat
p-value
Pearson Correlation
Applying to an apprenticeship
2.91
3.2
-6.6
1.72E-10
Strong positive correlation between pre
0.688 and post scores
Weak positive correlation
between pre and post
Studying and working as an apprentice
3.36
4.09
-14.42
1.49E-36
0.291 scores
Weak positive correlation
between pre and post
Apprenticeship is different from school / college
3.81
4.24
-9.1
1.06E-17
0.292 scores
Moderate to strong
positive correlation
between pre and post
People like me
2.97
3.16
-4.4
1.50E-05
0.637 scores
Weak positive correlation
between pre and post
I know enough
3.23
4.01
-12.93
5.73E-31
0.265 scores
Very weak positive
correlation between pre
Search for apprenticeship vacancies
2.6
4.02
-22.09
4.63E-66
0.176 and post scores
Weak positive correlation
between pre and post
How to apply
2.58
3.97
-23.85
1.24E-72
0.261 scores
Moderate positive
correlation between pre
I would get a place
3.24
3.48
-5.76
2.04E-08
0.570 and post scores
Weak positive correlation
between pre and post
Minimum wage
2.82
4.07
-20.35
1.95E-59
0.207 scores
Moderate correlation
between pre and post
Well-being support
2.83
3.5
-11.57
4.76E-26
0.364 scores
0.315 Small effect
0.843 Large Effect
0.538 Medium effect
0.223 Small effect
0.753 Medium to large effect
1.373 Large Effect
1.496 Very large effect
0.309 Small effect
1.247 Very large effect
0.720 Medium Effect
Cohen’ s d for Effect Size Analysis Cohen ' s d is a measure of effect size used in statistics to indicate the magnitude of difference between two groups. While a p-value tells you whether a difference is statistically significant, Cohen ' s d tells you how big that difference is.
Cohen ' s D
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