Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

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Oh! I see. As always, thanks!
Arrrhhh! That's more like it. See picture of normal distribution graph.
Ah, the answers were mixed up. The answer is actually 1.96. How did they get that?
hi genericname,
Hi, the problem is: 