1. On Desk: Learning Log: HW: WDYE p. 19, #11-18, 26-29
Math CC7/8 – Be Prepared
On Desk:
Pencil
Calculator
Math Journal
WDYE Learning Log
Parent Signatures?
Learning Log:
HW: WDYE p. 19, #11-18, 26-29
MSA Test Retakes –
-Today, 2:40 Room 203
-Thursday 1/25, 2:40 Room 203

2. MSA Test Data Unit Review complete, corrected and turned in-88%
Unit Review complete or almost complete and turned in but NOT corrected-81%
Unit Review NOT DONE/NOT TURNED IN-71%
1st
2nd
3rd
5th
6th
Arrange to meet with Mrs. Miner for extra help?
Take the retake! The units upcoming get tougher. You must understand the MSA unit for Algebra next year!

3. Tasks for Today Warm Up Collect any signed Paperwork? Lesson 1.3/1.4–
Begin HW?

4. One and ONLY Warning!
Whatifers will be asked to work on lesson 1.3 and 1.4 on their own OUT of the classroom!!
This includes students who find it necessary to get everyone OFF TASK!

5. Warm Up
Give an example of an event that has 100% chance of happening.
Give an example of an event that is impossible.
If an event is impossible, what is the chance that it will occur?

6. Warm Up
Which of the following numbers could not be the probability of an event?
1/4, , /8, /3
Explain why not…

7. Finish 1.3

10. Probability Probability: Mathematical term for chance
Experimental Probability:
A probability found by conducting an experiment and collecting data. What actually happens. Requires action!
Favorable Outcomes:
Trials in which the desired results occur

11. Notation:
We write probability as P(heads) =
“The probability of the coin landing on heads is…”
Relative Frequency:
Ratio of number of desired results over the total number of trials
Sample Space:
The set of all possible outcomes
Example: If the experiment is tossing a coin, the sample space is the set {H,T}.

12. Probability Continued…
In Friday’s/Tuesday’s experiment we tossed a coin. Suppose the coin landed on heads 7 out of the 10 trials.
Express this outcome using mathematical notation
P(head) = 7 10
- Notice we wrote…
total # of trials
P(event) = favorable outcome

15. P (match) = P (no match) =
Save time?
10 or 15 tosses
*No labsheet…record in a table in your journal.
P (match) =
P (no match) =

16. P (match) =
P (no match) =

17. 2 ways HH and TT
2 ways HT and TH
Yes, a match and a no match are equally likely

18. Kalvin’s results better predict the experimental probability of the thumbtack landing on its head because more tosses should lead to a better prediction.

22. Discuss in groups and reach a consensus. P. ?

23. Items 2, 4, 5, and 6 are equally likely
Items 2, 4, 5, and 6 are equally likely. The probability of equally likely events is 50% or ½ only if there are exactly 2 results.
Otherwise it is split equally among the equally likely results. (number cube – each is 1/6)

24. Bag of colored blocks or marbles:
Begin Inv. 2 when done!

29. A process of choosing/selecting so that each outcome has the same chance of being chosen
Yes, it makes a difference! If the block is NOT returned, the number of blocks of that color is reduced. So the probabilities of ALL the colors change.

30. Theoretical Probability
A bag contains 6 yellow blocks, 3 blue blocks, and 9 red blocks. You choose from the bag at random. What is…
The probability the block is yellow?
The probability the block is blue?
The probability the block is red?
What is the sum of the probabilities?
P(Y) + P(B) + P(R) =
6/18 + 3/ /18 = 18/18 = 1
P(Y) = 6/18
P(B) = 3/18
P(R) = 9/18

31. Experimental vs. Theoretical Probability
Do a class experiment, record your data, and compare experimental to theoretical probabilities
A bag contains 6 yellow blocks, 3 blue blocks, and 9 red blocks. You choose from the bag at random. Choose 10 times.
How do your experimental probabilities compare to your theoretical probabilities?