Tuesday, November 4, 2008

The Circus (Oct 31/Halloween!)

We talked about our halloween costumes for a small while at the beginning of class. 
Next we did 'Back to the Circus' pg 402... this was about a circus woman who wanted to stop really close to a wall on a bike. She wants to know when to put the brakes on and she wants to hit the wall only 5 % of the time. to solve this you must use your brain or look below for the answer

100-10 = 90 %
you do this because the normal distribution chart calculates for both sides of the curve so therefore you need to subtract 5% from each side which = 10

look at the chart at 90% and you will see the number SD and estimate the number. I got 1.65 as the SD. Then do a ratio. 
      1 SD  divided by .3 meters = 1.65 SD divided by X meters
this makes X equal .49 and then you add 2 because that is the median and you get to stop at 2.49 meters. 

Also did HW 9 in class but going over those in class tuesday....................... NO HOMEWORK!!! But.... there is a quiz on wed.:

Binomial Probabilities
3 Person Polls
Graph
Normal Distribution
Up to HW 7 
No table stuff
Answer:
Why can we approximate binomial distribution with norm distribution?

Reminder... you can retake end functions with this quiz. 

Next scribe= Marcus P 

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