APFIVE Comparing Crystallized and Fluid Intelligence
A study measured both crystallized and fluid intelligence in 15 adults aged 65-75. Scores were standardized on a 1-10 scale. The crystallized intelligence scores were: 8,7,9,8,7,8,9,7,8,8,7,9,8,7,8. The fluid intelligence scores were: 6,5,7,6,5,6,7,5,6,6,5,7,6,5,6. What is the difference between the mean crystallized intelligence score and the mean fluid intelligence score?
A
2.0
B
2.5
C
1.8
D
1.5
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