Here we are, finally time for a test on Chapter 5. It's all about ratios, mean, median, mode, and range.
You can find the review guide online at the www.bigideasmath.com site. Click on students, go, pick the green book, then chapter 5.
Also, if anyone needs or wants help, I'll be in my room each day at lunch and after school on Wednesday for extra tutoring until 3:30 pm.
Here's a practice quiz, if the link works: practice quiz
Tuesday, February 26, 2013
Wednesday, February 20, 2013
Median, Mode, and Range
Tomorrow we're starting to look at median (the middle number), mode (the number that occurs the most), and range (simply the highest minus the lowest.)
Also, I found a really cool Mario video I might show in class if there is time. It will help us practice some math range skills.
Here's an example data set:
Also, I found a really cool Mario video I might show in class if there is time. It will help us practice some math range skills.
Here's an example data set:
Monday, February 18, 2013
Mean (average) day 2
Second day of average. It's basically this simple:
1. add up all of the data points (numbers)
2. divide the total by however many numbers there were.
Example:
Let's say Mr. Flaten sits at a stop light and times how long he waits each time. Let's pretend there were five lights and the times (in seconds) were: 7, 13, 10, 5, and 15.
How long would I wait on average?
1. Add up the numbers, the total is: 50 seconds
2. Divide by the five stop lights, so 50 divided by 5. The average time waiting at a light would be 10 seconds.
The second factor would be an outlier. That's when there is a number or numbers that are way outside of the "normal" range of numbers in the set. For example, if I have to wait at a stop light for 62 seconds because of a police vehicle, it would increase my average, but not really be a true representation of the mean.
Here's tonight's assignment: Section 5.4 Puzzle time sheet.
Found a youtube video that might help: http://www.youtube.com/watch?v=tgxZfQDf4qY
1. add up all of the data points (numbers)
2. divide the total by however many numbers there were.
Example:
Let's say Mr. Flaten sits at a stop light and times how long he waits each time. Let's pretend there were five lights and the times (in seconds) were: 7, 13, 10, 5, and 15.
How long would I wait on average?
1. Add up the numbers, the total is: 50 seconds
2. Divide by the five stop lights, so 50 divided by 5. The average time waiting at a light would be 10 seconds.
The second factor would be an outlier. That's when there is a number or numbers that are way outside of the "normal" range of numbers in the set. For example, if I have to wait at a stop light for 62 seconds because of a police vehicle, it would increase my average, but not really be a true representation of the mean.
Here's tonight's assignment: Section 5.4 Puzzle time sheet.
Found a youtube video that might help: http://www.youtube.com/watch?v=tgxZfQDf4qY
Wednesday, February 13, 2013
Quiz and Mean
Today we took a quiz and will have the results in the gradebook soon. So far this chapter it was rates and ratios. Tomorrow we're on to Mean.
Oops, not that kind, the math kind. Mean is the same as average, so here's an example of tomorrow's opening activity.
Oops, not that kind, the math kind. Mean is the same as average, so here's an example of tomorrow's opening activity.
Wednesday, February 6, 2013
Ratios and Rates Chapter schedule
Here's the timeline of our current chapter:
Important dates: March 4th should be the test and there are quizzes after sections 3 and 6.
Sunday, February 3, 2013
Super Bowl predictions
On Friday we spent the last two minutes of each class trying out some probability and wrote down some guesses to some Super Bowl questions. I'll repost the questions and try to back them up with actual math to see if I can be more accurate.
1. Who will win? 49ers or Ravens MY PICK: RAVENS
logic: Ravens points per game this year 24.9, Niners ppg 24.8. That's close, hmm, mathematically I'm going Ravens, but it's pretty much 50/50 (that's a ratio, not a fraction)
2. Will the National Anthem be over or under 2 minutes and 15 seconds?
logic: Youtubed some videos, seems the longest an anthem has been thus far is about 2 minutes, I don't see this one being the longest ever, so I'm going UNDER.
3. What will be the total points scored? MY ANSWER: 50
logic: I searched average points scored in super bowl and it seems it is 54, but based on the teams ppg earlier I 'll say 50. This would be a good place to talk about range and see how close I could be. My probability of getting this one exactly right is not great.
4. Will the MVP be an offensive or defensive player? MY ANSWER: OFFENSE
logic: It seems 50/50, but researching past MVPs it breaks down as such: Offensive: 38 Defensive: 8 ST: 1
5. Coin Toss, Heads or Tails?
logic: this should eventually average out, let's check the history. Heads: 25, Tails: 21 Seems that it should be tails to try to get it to 50/50, it's also been heads four years in a row. I'm going TAILS. Some students also said you can win free pizza for guessing that on a pizza site.
Bonus: This is a weird question, what color top will Beyonce have on for the halftime show?
logic: Who knows? I'm going to put her name in an image search and see which one has the highest frequency (vocab word!) and go with it. SILVER is my official guess.
Should be fun to see how well we predict these. See you Monday!
1. Who will win? 49ers or Ravens MY PICK: RAVENS
logic: Ravens points per game this year 24.9, Niners ppg 24.8. That's close, hmm, mathematically I'm going Ravens, but it's pretty much 50/50 (that's a ratio, not a fraction)
2. Will the National Anthem be over or under 2 minutes and 15 seconds?
logic: Youtubed some videos, seems the longest an anthem has been thus far is about 2 minutes, I don't see this one being the longest ever, so I'm going UNDER.
3. What will be the total points scored? MY ANSWER: 50
logic: I searched average points scored in super bowl and it seems it is 54, but based on the teams ppg earlier I 'll say 50. This would be a good place to talk about range and see how close I could be. My probability of getting this one exactly right is not great.
4. Will the MVP be an offensive or defensive player? MY ANSWER: OFFENSE
logic: It seems 50/50, but researching past MVPs it breaks down as such: Offensive: 38 Defensive: 8 ST: 1
5. Coin Toss, Heads or Tails?
logic: this should eventually average out, let's check the history. Heads: 25, Tails: 21 Seems that it should be tails to try to get it to 50/50, it's also been heads four years in a row. I'm going TAILS. Some students also said you can win free pizza for guessing that on a pizza site.
Bonus: This is a weird question, what color top will Beyonce have on for the halftime show?
logic: Who knows? I'm going to put her name in an image search and see which one has the highest frequency (vocab word!) and go with it. SILVER is my official guess.
Should be fun to see how well we predict these. See you Monday!
Friday, February 1, 2013
Exciting news!
Everyone now has a take home record and practice journal as of today! This means they can bring home the math and share it with you. It looks like this, but without the notebook paper in front:
I'm excited to share the opportunity with you to partner in having a resource to take home and learn from. The assignment for today is the Chapter 5 Fair game review around page 101-102.
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