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Transcript of Probability
Making predictions from Data
P (event) * number of trials = number of predicted success
Probability is the chance
of something happening.
THERE ARE TWO TYPES OF probability...
Prezi By: Kylie A., Sophie G., Quinn B., and Lulu D.
OUTCOME - the result of an action. Ex: Flipping a coin and it landing on heads.
EVENT - an outcome or group of
outcomes. Ex: Pointer landing on blue is an event
PROBABILITY OF AN EVENT - a number that describes how likely it is that the event will occur. Ex: 1/2 OR 50% a coin will land on heads.
YOu're playing Rock paper scissors.
Here are the results:
that you will play
probability is in theory what would happen. There is
that the event will happen that way.
Flipping a coin and it landing on tails
on numbers a In the picture above, the THEORETICAL probability that you will spin a
item is 1/4 times, and if you were to spin a white, it would be 2/4 or 1/2.
Question: If you were going to flip a coin 12 times, how many times would the coin land on tails.
Show the probability of all the possible outcomes.
TREE DIAGRAMS ARE TO...
number of times event occurs
SPINNING A SPINNER (5 colors; red, blue, green, purple, yellow)AND THEN TOSSING A COIN.
what is the PROBABILITY THAT YOU WILL SPIN RED AND TOSS A Heads?
Let's use a tree diagram to find out
You're playing Rock, Paper, Scissors.
Roll 1: Rock
Roll 2: Scissors
The Counting Principal
Roll 3: Paper
Roll 4: Rock
Roll 5: Rock
Roll 6: Rock
The Counting Principal is multiplying to find the different combinations for an event.
Roll 7: Paper
An independent event is when the first event doesn't effect the second event.
I rolled a 6
You're ordering a hamburger. You have 4 meat choices, 2 tomato choices, 5 cheese choices, 2 bun choices, and 2 lettuce choices How many different burgers can you have?
2 x 2 x 2 x 4 x 5 = 160
Not independent Event or dependent event
Permutations is the arrangement of objects in a particular order.
let's look at an example!
A not independent event is when the first event effects the outcome of the second event.
two or more separate events
To find the probability of a compound event you have to multiply the two fractions of each event
I roll a
I roll a six sided cube, and flip a coin. What is the chance that I will roll a 6 and flip a heads
1 1 1
2 6 12
Chloe is sending a text. Find the permutations of the emojis.
Experimental probability is gathering information from an experiment and using the outcome to find the probability.
I FLIPPED A COIN
I took a marble from a bag and didn't replace it. Then took another marble from the bag