7.3 - The Sigmoid Function
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is the output of the sigmoid function when z = 0?
💡 Hint: Substitute z = 0 in the sigmoid formula.
If σ(z) = 0.8, what category does this fall into?
💡 Hint: Compare 0.8 with the threshold of 0.5.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the range of the output values from the sigmoid function?
💡 Hint: Consider how the function is defined mathematically.
True or False: The sigmoid function can predict multiple class outcomes beyond binary classification.
💡 Hint: Focus on the definition of sigmoid in context.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Given a dataset with two features and z calculated as 2.0, predict the output using the sigmoid function and classify it.
💡 Hint: Use the sigmoid formula to find the probability!
Discuss how changing the threshold from 0.5 to a higher value affects sensitivity and specificity in classification.
💡 Hint: Evaluate how class imbalance may play a role.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.