Quiz configuration
183 questions available across sixteen learning categories.
Interactive sigmoid explorer
Change the logit and threshold to inspect probabilities, gradients, and predicted classes.
Sigmoid output
0.5000
Derivative
0.2500
Predicted class
Positive class (1)
Sigmoid: σ(x) = 1 / (1 + e-x)
Derivative: σ′(x) = σ(x)(1-σ(x))
Logit: logit(p) = ln(p/(1-p))
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Average time0.0s
Formula sheet
- σ(x) = 1 / (1 + e-x)
- σ′(x) = σ(x)(1-σ(x))
- logit(p) = ln(p/(1-p))
- odds = p/(1-p)
- p = odds/(1+odds)
Question navigator
Green: answered. Yellow outline: marked.
Quiz performance report
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