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Science Bowl Question

📅 NSB 2011🎓 HS🔄 Round 7#️⃣ Q11❓ Toss-Up📝 Multiple Choice

Which of the following is NOT a property of the normal p.d.f.?

W) The p.d.f. is symmetric
X) The p.d.f. has two inflection points
Y) The variance has to be positive
Z) The domain of the p.d.f. is non-negative real numbers
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