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Solutions+Practice+Test+2A - Solutions Practice Test 2A...

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Unformatted text preview: Solutions Practice Test 2A 1. P(Q1)=1/4N + ½= 3½; P(Q3)= 3/4N + ½ = 9½. IQR= 28 ­20=8 2. No, because symmetry means both sides are the same, so cannot have outliers on one side that aren’t on the other. 3. 4. Mean 5. 1 6. 1 ­1/k^2 ­ 1 ­1/3^2= .88 or 88.8% 7. .997 OR 99.7% 8. Positively 9. µ ­ mu 10. ΣXY=23 (ΣX)(ΣY)= 60 11. 12. Yes. No skew simply means the “extremes” of the scores at both ends balance. It doesn’t require symmetry to do this. 13. Q1=3 Q3=8. 8 ­3=5. 14. Amy ­ 2.75; Brian ­1.75; AMY! 15. False. The normal curve is a very specific curve. 16. Standardize it 17. No association 18. The mode ...
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This note was uploaded on 12/12/2010 for the course ECON ECON 15A taught by Professor Rajendram.patel during the Fall '10 term at UC Irvine.

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