Practice The Sigmoid Function (7.3) - Chapter 7: Supervised Learning

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10 questions

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6 sample questions

Question 1.
What is the output of the sigmoid function when z = 0?
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Substitute z = 0 in the sigmoid formula.
Question 2.
If σ(z) = 0.8, what category does this fall into?
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Compare 0.8 with the threshold of 0.5.
3Question 3.
What is the range of the output values from the sigmoid function?
- -1 to 1
- 0 to 1
- 0 to infinity
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Consider how the function is defined mathematically.
4Question 4.
True or False: The sigmoid function can predict multiple class outcomes beyond binary classification.
- True
- False
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Focus on the definition of sigmoid in context.
Question 5.
Given a dataset with two features and z calculated as 2.0, predict the output using the sigmoid function and classify it.
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Use the sigmoid formula to find the probability!
Question 6.
Discuss how changing the threshold from 0.5 to a higher value affects sensitivity and specificity in classification.
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Evaluate how class imbalance may play a role.

6 more questions in this section. Enroll free to practise them all.