Math 151 , Spring 2007  Wed. Day 26, April 4 Hit reload... After class

HW:  Read  Ch. 10 to p. 256.  Exam covers "Sample space"but not probability assignments to them, Check p. 263ff. 10.19, 20 for exam 3, then , 22, 23, 24, 25, 26, 27.   Read rest (Note Normal distribution is back) . Check 10.21, 28
Hand in  Monday .
= = = = = Probability , Ch. 10. 
(If you didn't for today or you did it wrong:  p. 249, 10.3 50, 200 Random digits.  Bring your result for (b) to class to compare with others.  I did it 4 times (four sets of 200 tosses) , got .06, .09, .07, .14!   Applet:  Probability)

Postpone (again) the rest:  BUT Please read all of Ch. 10 and review Normal Distribution!
 p. 250, 10.4 Probability says..
p. 254, 10.9 Canadian languages
p. 254, 10.12 Watching TV
p. 266, 10.37 Land in Canada

p. 265, 10.31 Probability models?  Note, you only are checking whether the model is legitimate, not whether it's correct for the phenomenon described!
p. 261, 10.16 Grades RV
p. 252, 10.6 and 10.7 D&D, 4-sided dice
p. 267, 10.42 Race and ethnicity

p. 256, 10.10 rolling die.  Which obey the probability rules?
p. 268, 10.44 Benford One more discrete probability
Read, to discuss


Optional 



Exam Friday April 6 (Day 27), Next class.  Bring one sheet of notes (& calculator).   End of Ch. 5, Chapters 8 and 9 and (part of) 10--through HW assigned last time.
   Sample exam available today. # 5 may be covered, # 6 will not be covered!.  Solutions Here and on reserve (now).Note that there is no problem on the sample involving two (or more)" factors" or expressly listing "factors" and "treatments", but such questions could be on the exam.  The sample exam is way too long.
I have been known to ask questions on the exam specifically on the "outside" reading, such as the Placebo Effect articles.
Review Normal distribution: we'll want it soon after the exam.

Pre exam help:  Helpers
Wed:    Jen (as usual) 8:30 pm -10:30 pm
   Anna (extra!) 1:30-4:30 pm
   Sievers: (in office, Mac 102)   10:30-11:00, 12:30-3:45--preferably let me know when! sievers@wells.edu
Thursday:  Anna (as usual) 9:30-11:00am
   Rest of Anna's Thursday and Friday hours Cancelled!
   Jen (as usual)  3-7 pm; will stay later if needed.  jchieng@wells.edu to confirm later with her.

Please add your proportion of "heads" = "0's" from 200 repetitions ("tosses") to the dotplot circulating.
Sample exam questions?  Others?
Chapter 10, Probability (intro)
Bare Bones:  Chance  behavior (a random phenomenon): Unpredictable in the short run,  predictable regular pattern in the long run.   "Probability" of particular something happening: proportion of times it would happen in a very long series of (independent) repetitions of the phenomenon.   Applet:  Probability

Probability Models : (p. 250-256)
   Random phenomenon, described by
    Sample space S:  set of all possible outcomes (no overlap of descriptions)
    Event:  any outcome or set of outcomes
    Probability model: S, and a way of assigning a probability to each event.
Sample space depends on what you want to know:
Phenomenon: Flip coin twice.
    S1 = {HH, HT, TH, TT}     S2 = {0, 1, 2} number of heads   S3 = {Y, N} both are heads? \
  WE DID NO NEW MATERIAL MON:  Exam 3 stops here.
We did no new material today either :(

continued Details Day 24  , and Day 25

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