Question
How does data snooping bias arise in model testing?
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Answer
By testing many models on the same data until one looks significant.
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Question
What is the key distinction between supervised and unsupervised learning?
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Answer
Supervised uses labeled outcomes; unsupervised finds patterns without labels.
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Question
How does supervised learning differ from unsupervised learning?
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Answer
Supervised uses labeled outcomes; unsupervised finds structure in unlabeled data.
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Question
In the CFA context, what does fintech mean within big data techniques?
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Answer
Technology-driven innovation in financial services.
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