GATE 2026 PI – Question 28

Engineering Mathematics · Probability and Statistics · 1 mark · Multiple select

Which ONE OR MORE values can be a correlation coefficient?

Show answer and explanation

Correct answer: (A) 0; (C) −0.9

Explanation

A correlation coefficient satisfies $-1\le r\le1$ by the Cauchy–Schwarz inequality. Thus 0 and −0.9 are possible, while 10.3 and 2 are not. **A,C**.

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