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Thursday, March 17, 2011
hw #5-7
Read 242-243 (this should be easy)
Pg 243-244 #5-11 Odd
Read 246-248 (this is what we did today)
Understand that P(event) means the probability of an event occurring
pg 248-49
#1-5 All
#7-25 Odd
You need to read pages 246 and 247. The P(E) notation simply refers to the probability of an event, E, happening.
If a bag is filled only with red, white and blue marbles - P(red, white,or blue) simply translates as "What is the probability of choosing a red, white, or blue marble?
In this problem, if there are a total of 17 marbles in the bag, the the numerator will be the total of red white or blue marbles (which must be 17) and the denominator will be the total number of marbles (which also must be 17, yes?).
So the probability of choosing a red, white, or blue marble is 17/17 or 1.
Do the same exercise with 52 marbles, 117 marbles or n marbles. In each respective case you will obtain 52/52=1, 117/117=1, and n/n=1.
If the number of favorable outcomes is equal to the number of possible outcomes, we will always have a probability of 1 (aka 100%).
Finding the sample space is another way of saying "list all of the possible outcomes."
The book has an example on page 248... I assume you are talking about question 21 regarding coin flips... that is VERY similar to the family boy-girl situation on page 248.
You flip a coin and the outcome can be a head (H) or tail (T), right?
So, just as Example 4 show Child1 B or G, you would show Toss1 H or T, right?
Toss2 could be an H or T, but now you have to show it twice, once for the H for Toss1 and once for the T for Toss1... and so on for the 3rd toss and more if the problem required it. For three tosses you should end up with a "final" column sample space of
HHH HHT HTH HTT THH THT TTH TTT
... it doesn't have to be in the same order, but if you listed the outcomes in the same order (H then T) each time, it might be in the same order.
the homework you gave us today was to do the chapter review... and/or the chapter test. can i just do the chapter test because that for some reason helps me more than the review. but if i am struggling with anything i go back to the review for more help and more problems.
I DONT GET #2 ON 248 DOESNT MAKE SENSE!!!! HELP
ReplyDeletemr c imgoing to ask you lot of questions in homeroom on monday because i had a lot of non online answerable questions
ReplyDeleteNo need to SHOUT, ok?
ReplyDeleteYou need to read pages 246 and 247. The P(E) notation simply refers to the probability of an event, E, happening.
If a bag is filled only with red, white and blue marbles - P(red, white,or blue) simply translates as "What is the probability of choosing a red, white, or blue marble?
In this problem, if there are a total of 17 marbles in the bag, the the numerator will be the total of red white or blue marbles (which must be 17) and the denominator will be the total number of marbles (which also must be 17, yes?).
So the probability of choosing a red, white, or blue marble is 17/17 or 1.
Do the same exercise with 52 marbles, 117 marbles or n marbles. In each respective case you will obtain 52/52=1, 117/117=1, and n/n=1.
If the number of favorable outcomes is equal to the number of possible outcomes, we will always have a probability of 1 (aka 100%).
Ca-peesh??
How do you do the tree diagram for sample space?
ReplyDeleteFinding the sample space is another way of saying "list all of the possible outcomes."
ReplyDeleteThe book has an example on page 248... I assume you are talking about question 21 regarding coin flips... that is VERY similar to the family boy-girl situation on page 248.
You flip a coin and the outcome can be a head (H) or tail (T), right?
So, just as Example 4 show Child1 B or G, you would show Toss1 H or T, right?
Toss2 could be an H or T, but now you have to show it twice, once for the H for Toss1 and once for the T for Toss1... and so on for the 3rd toss and more if the problem required it. For three tosses you should end up with a "final" column sample space of
HHH
HHT
HTH
HTT
THH
THT
TTH
TTT
... it doesn't have to be in the same order, but if you listed the outcomes in the same order (H then T) each time, it might be in the same order.
We will go over this in class.
the homework you gave us today was to do the chapter review... and/or the chapter test. can i just do the chapter test because that for some reason helps me more than the review. but if i am struggling with anything i go back to the review for more help and more problems.
ReplyDeleteis compound interest on the TEST!!!!!!
ReplyDeletethere was a ? on the web site about it
luke
Simple interest... not as complex as compound...
ReplyDelete