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BIO 201 Objective Question
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Question

When plotting a diagnostic ROC curve, what line represents a completely uninformative test?
Options
A A 45-degree diagonal line from (0,0) to (1,1)
Correct Answer
B A vertical line along the Y-axis at X = 0
C A horizontal line along the top margin at Y = 1
D A parabolic curve opening downward toward the X-axis
Correct Answer

Option A is the correct answer.

Detailed Explanation

The 45-degree line represents equal rates of true positives and false positives across all cutoffs, denoting zero diagnostic discrimination.

Hint

No hint available

Question Info

Course: BIO 201
Type: Objective
Difficulty: Not specified
Question 49 of 285
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