True and False Positives Instructions:Number of questions: 10Time limit: 20 minutesMust be finished in one sitting. You cannot save and finish later.Questions displayed per page: 1Will allow you to go back and change your answers.Will not let you finish with any questions unattempted. 1 / 10 What is the definition of a true positive? (e.g., is a smoke alarm going off because it detected smoke?) An outcome where the model incorrectly predicts the positive class An outcome where the model incorrectly predicts the negative class An outcome where the model correctly predicts the positive class An outcome where the model correctly predicts the negative class 2 / 10 What is the definition of a false positive? (e.g., did a smoke alarm get triggered even though there's no smoke?) An outcome where the model incorrectly predicts the positive class An outcome where the model incorrectly predicts the negative class An outcome where the model correctly predicts the positive class An outcome where the model correctly predicts the negative class 3 / 10 What's a simple name or synonym for a true positive? Skip False skip Alarm False alarm 4 / 10 What's a simple name or a synonym for a false positive? Skip False skip Alarm False alarm 5 / 10 A smoke alarm is triggered in the middle of the night when it detects fire or smoke. This is an example of: True Positive True Negative False Positive False Negative 6 / 10 A fire alarm is triggered when there is no fire or smoke. This is an example of: True Positive True Negative False Positive False Negative 7 / 10 A company is running a functional test on new glass break sensors for their home security system. Test result is pasted below. How many tests are true positives? 95 5 99 1 8 / 10 A user is trying to unlock his phone with his face. When is it a true positive? The phone remain locked even after scanning his face The phone remain locked after scanning someone else’s face The phone was unlocked after scanning his face The phone was unlocked after scanning someone else’s face 9 / 10 A user is trying to unlock his phone with his face. When is it a false positive? The phone remain locked after scanning his face The phone remain locked after scanning someone else’s face The phone was unlocked after scanning his face The phone was unlocked after scanning someone else’s face 10 / 10 Driving a Tesla Model X on the road with the lane departure warning, 2 out of 1,000 times, the car issued a warning even when the car stayed within its lane: so a lane departure warning was correctly issued 998 times. But 1 out of 10,000 times, there was no warning when the vehicle drifted out of a lane. How many true and false positives occurred? Assume a positive scenario is a warning issued when a car departs from its lane. True Positive = 998 and False Positive = 9999 True Positive = 2 and False Positive = 1 True Positive = 998 and False Positive = 2 True Positive = 9999 and False Positive = 1 Your score is 0% Restart quiz
