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Wednesday, May 10, 2006

Eight Hall of Famers in a row...Pressures on =S. Sorry if I kill the winning streak.

Mr. Kuropatwa was late today..That means l e m o n s q u a r e s ..yayy =) Can't wait. There's a new empress in town, yes Charlene did an awesome job. Anyways there will be an upcoming online quiz, which consists of 10 questions, 30 minutes to write it. It'll probably activated over the weekend. The Probability TEST will be on MONDAY. You know what that means, blogging on blogging posts.

We started off class with some board questions:

A 25 member high school committee consists of 7 female teachers, 8 male teachers, 6 female students and 4 male students. Find the probability that a 5 member sub-committee:

A) consists of only males
B) consists of only teachers
C) is made up entirely of male teachers
D) contains at least one female student




A new medical test for Glaucoma is 97% accurate. Suppose that 0.6% of the population have Glaucoma. Find the probability that:

A) A randomly selected person will test negative

B) A person who tests negative has Glaucoma

C) A person who tests positive does not have Glaucoma

Solutions:

A)

P(N)= P(GN) + P(HN)

P(N)= 0.00018 + 0.96418

P(N)= 0.9644 or 99.44%

B) P(GN) = P(GN)/( P(GN)+P(HN) )

P(GN)= 0.00018/(0.00018+0.96418)

P(GN)= 0.0187%

C) P(HP)= P(HP)/( P(HP)+P(GP) )

P(HP)= 0.02982/(0.02982+0.00582)

P(HP)= 0.582%

After completing these board questions we received a worksheet and got into groups.

Here are some questions on the worksheet:

The teacher of a physical education class has two bins of balls. Bin A has 4 soccer balls and 6 volleyballs. Bin B has 2 soccer balls and 8 volleyballs. The chart below shows the probability of a student selecting either bin, and then a ball within that bin.

A) Determine the probability that a student will select a volleyball.

B) Given that the student selected a soccer ball, determine the probability it came from Bin B.

C) If the students are permitted to use bin A, what is the probability that a student will select exactly 2 soccer balls, and 1 volleyball if three balls are selected?

Solutions:

A) P(V) = P(AV) + P(BV) = 0.72 or 72%

B) Didn't quite get to finish because class had ended.

C) 10C1 + 10C2/10C3 = 0.4583

Well class ended before we got to finish the worksheet and check the answers. There was nothing for the dictionary today but don't forget to do blogging on blogging post. Homework, textbook page 396, questions 1-13.

next scribe: R a y m o n d (my little sister chose the scribe because I could not decide haha.)

Anyways this was a lot of fun but now I'm done so see you later.

=) =) =) =) =) =) =) =)




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3 Comments:

At 5/10/2006 8:25 PM, Blogger Mr. H said...

What makes a scribe hall of fame worthy?

Clear precice explanations of the concepts of the day. Graphics to enhance the learning experience. Your post used colours, graphics and your knowledge of probability to explain what happened in class today.

If Mr K does not beat me to it I would nominate you for the hall of fame because you got straight to the point and used many different visual stimuli to enhance my learning experience.

Thanks for doing such a good job.

Mr.Harbeck
Sargent Park School

 
At 5/10/2006 9:15 PM, Blogger Mr. Kuropatwa said...

Ahn, Mr. H. is right! To take a line from you:

There's a new Emperess in town.

Today was the kind of class that I think of as a "solidfying skills" class. Your scribe clearly lays out the questions and solutions in a way that anyone familiar with what we've been studying can easily follow.

Bravo! 9 in a row!

Y'know, six is my favourite number but I like 9 too. Think about it -- what do you get if you turn it upside down? ;-)

 
At 5/12/2006 7:17 PM, Blogger Lani said...

Hi Ahn,

I hope I'm not too late to add my congratualatory wishes on maintaining the winning streak!!

Clarity seems to be the attribute on which we all agree; often very hard to achieve; yet you excelled!

Best,
Lani

 

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