1. PROBABILITY
What are the chances?

2. EXPERIMENTAL PROBABILITY
The ratio of the number of times an event occurs to the total number of trials or times the activity is performed.
The number of ways that an event can occur, divided by the total number of outcomes. The probability of events that come from a sample space of known likely outcomes.

3. 15, 5
15, 5
n/a, n/a
6, 6

4. Measures of Central Tendency
Mean (average): Add the set of data and then divide by the number of the data set
Mode (most): the data that is listed the most times
Median (middle): the mean of the middle numbers
Range: the difference between the greatest and least

5. Student Name
Red
Card
Black Card

6. Likely or Unlikely? Definitely going to occur
What is the chance of pulling out a purple marble without looking?
P(purple) =
Blue?
P(blue) =
Might occur
Red?
P(red) =
Orange?
P(orange) =
Green?
P(green) =
P(event) = # of ways it can happen
total number of outcomes
Definitely NOT going to occur

8. UNLIKELY
AS LIKELY AS NOT
LIKELY

9. Experimental Probability68 67 65 75 45 58 51 49 74 80 78 77 63 54 79 84 70 72 71 56 53
40%
The ratio of the number of times an event occurs to the total number of trials or times the activity is performed.
6 out of 15 days had a temperature greater than 75°
100%
Everyday had a temperature less than 75°
# of times the event occurs 0%
There were no days that had a temperature greater than 100°
total # of trials

10. Independent Events P(A and B) = P(A) • P (B)
Two or more events that do not affect each other

12. Two or more simple events Ex: tossing 2 dice flipping 3 coins
1st 2nd 3rd
Tree Diagram
Outcome
52 cards in a deck
P ( , , )
Draw 3 cards without replacing
P(A and B) = P(A) • P(B/A)
When the outcome of one event, effects the outcome of another.
Ex: choosing a marble from a bag and NOT replacing it before choosing another.
P(A ) means Probability of Event A
P(B/A) means Event B given Event A

13. Draw a tree diagram of rolling 2 number cubes.
P(both number cubes are even)
1st cube
2nd cube
Outcomes