- 1 current stop: learning
- 2 upcoming
- 3 upcoming
- 4 upcoming
- 5 upcoming
Finish after stop 5
Stop 1 of 5 · Junction with a gentle S-bend
Trick to keep in mind+3 XP
Sigmoid bends any score into 0 to 1; a score of exactly 0 is the middle of the S.
Logistic regression computes an ordinary weighted score z, then passes it through 1 / (1 + e^-z). Very negative scores flatten toward 0 and very positive ones toward 1, and every real number is a valid input. To find the value at z = 0, remember what e raised to the power 0 equals.
Read it once, then a question tests whether the trick stuck.