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Topic: REA book. Interesting Article.
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Drube Gregg

Posts: 12
Registered: 12/6/04
REA book. Interesting Article.
Posted: Apr 1, 1997 1:32 PM
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Hello all,

Two things:
Thing One. I too just received a copy of the REA AP Stat review book,
and I went through one of the practice tests yesterday. I agree with Al
(Coons), it is a valuable resource for review materials but found some
glaring typos and I'm not sure, but some questions seem not to fit the
syllabus topics (at least the syllabus I have)---poisson and
hypergeometric distributions(??). However, there are many many
questions and problems, and if they create questions and discussion from
my students, I'm all for them.

Thing Two:
Check this out, does this make sense: In the Sioux Falls (that's in
South Dakota) paper last summer I found these numbers:

(Powerball is a multistate lottery, choose 5 of 45, and choose 1 of
another 45, i.e. the "Powerball"!!!)

Sales of Powerball Lottery tix: $3.6 billion
Number of Jackpots won: 65

Assuming $1 per play: 65 out of 3.6 billion plays were winners.
That is about 1 winner for every 3.6billion/65=55,384,615 or
approximately 1 in 55 million. The theoretical probability is 1 in
54,979,155 (ie. about 1 in 55 million) ( Law of Large Numbers???)

I know I haven't counted multiple winners of the same jackpot but.....



Gregg Drube
T.F. Riggs High School
1010 East Broadway
Pierre, SD 57501
(605) 773-7350
(605) 773-7360 (Fax)
drubeg@pierre.k12.sd.us





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