The performance final is tomorrow Friday, the 27th. It is worth 5% of your entire grade. Study!!!
In class we reviewed logic and statistics/probability. Check the unit 4 and unit 5 posts for more information on that material.
Here is an example for a probability question:
You have a bag with 15 marbles. 5 are green, 6 are blue, and 4 are red. What is the probability that you choose a blue marbles?
How many are blue? 6
How many are in the bag 15?
So, 6/15. Are we done? No, we still have to simplify. 6/15 will simplify to 2/5 when you divide both the numerator (top) and denominator (bottom) by 3.
Click on Math 1 to download a copy of the EOCT study guide.
Video about basic probability from Khan Academy.
Mean=the average of your data set. It is the sum of your observations divided by your number of observations.
Median= the middle number in your data set when it is ordered from least to greatest. The formula to find the correct term is n+1/2. That will only tell you which term to look for i.e. 2nd, 5th, 8th and not the actual median. When you have an even number of terms you must find the average between the 2 middle terms. If you have 6 terms organized least to greatest you would find the average between terms 3 and 4.
Mode=the most common observation
Range=Largest value-smallest value
Mean absolute deviation=the measure of how consistent your data is. The statistic measures how close or far away from the mean your data is.
Here are the steps to find mean absolute deviation:
1. Find the mean of the data
2. Subtract the observations from the mean
3. Find the absolute value of those differences
4. Add up the absolute values
5. Divide by the number of observations
The formula to find the sum of the interior angles in a polygon is (n-2)*180 where n is the number of sides.
Find the sum of the interior angles in a Pentagon
A pentagon is a 5 sided shape so we plug 5 into our formula
(5-2)*180=Sum of interior angles in a pentagon
The sum of the exterior (outside angles) in a polygon ALWAYS equals 360
Olympians are athletes.
Conditional (if then)- If you are an Olympian, then you are an athlete
Converse (switch)- If you are an athlete, then you are an Olympian.
Inverse (negate)- If you are not an Olympian, then you are not an athlete.
Contrapositive (switch and negate)- If you are not an athlete, then you are not an Olympian.
Bi-conditional (if and only if)- You are an Olympian if and only if you are an athlete.