A212­6and12­7Notes.notebook
February 15, 2012
Algebra 2
Ch.12 Notes Page 27 & 28
P27 12­6 Binomial Distributions
P28 12­7 Normal Distributions
12­6 Binomial Distributions
BiNomial Experiments
Involves Repeated Trials
Each Trial has 2 outcomes (Success/Failure)
Probability of Success is Constant in Trials
x n­x
nCxp
q
Team wins 80% of Games.
Probability of Winning 5 out of 6???
p = success
q = failure
A212­6and12­7Notes.notebook
February 15, 2012
Probability of Success and Failure
A Football team wins 70% of their games. What is the probability that they will win 2 out of the next 3 games?
Don't forget to add in the chance of failing.
A coin is tossed 5 times. What is the probability that 3 out of the next 5 tosses will be heads? 12­7 Normal Distributions
Normal Distributions show data that vary randomly from the mean. The pattern the data form is a bell­shaped curve (called a normal curve)
1 Std Dev = 68.2%
2 Std Dev = 95.4%
3 Std Dev = 99.7%
In a Group of 300 People, What number of the people should be within +/­ 1 Standard Deviation of the Mean?
A212­6and12­7Notes.notebook
February 15, 2012
HW #22
12­6
12­7
P689 #5,6,8,9,25a
P695 #1,4,5,9­15
Please put your name and class period at the top of the homework. Also include the homework number.