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Sunday, June 10, 2007

Just in case some of you have tried the Extra Questions for Normal Distribution ...

If you got almost every single question wrong ... don't worry :)

Errata (on answer sheet):
- Strike off the answer for Q18
- For Q2-17, change the numbering to Q3-18 (i.e. answer for Q2 is for Q3, answer for Q3 is for Q4 etc.)
- Correct answer for Q2: (a) 20.3% (b) 81.0 grams (c) 0.875

Missing info:
- Q4: For X, mean = 36, std dev = 8; For Y, mean = 60, std dev = 12
- Q6: For James, mean = 2.25, std dev = 0.5; For Devin, mean = 2.5, std dev = 0.25

cheers
HBY