Today in class students learned about mean absolute deviation. They should have a page of notes in their math notebook to help them with the practice homework tonight.
Homework: Complete the four practice problems with the grids to fill in. Don't forget the Ten Marks Jam Sessions are available for mean, median, etc...
QUIZ Monday on Data Analysis (box and whisker plots, histograms, mean, median, mode, range, interquartile range, and mean absolute deviation. There may be a stem and leaf plot for bonus points.)
In class today students worked together on interpreting box and whisker plots. We will quiz on data analysis Monday.
Homework: hand out - What happens when joggers get mad? Use the data to make tally marks by the score in the chart. Then write how many tally marks you made in the frequency column. Then divide the frequency by the total number of scores, moving the decimal two places, for the percent. Finally use colored pencils to create the histogram of the data.
In class today we looked again at what makes a good data sample, and how to compare box and whisker plots.
Homework: Skills: Reading Box Plots #5-8
In class today we reviewed how to read a box plot, and practiced analyzing data for the best measure of center (mean, median, or mode) and what the variability of the data was (range).
Homework: Handout - Additional Practice #1 a-e and Skill:Representing Samples #1-4.
In class today we discussed collecting data, plotting data, and the different types of graphs.
In class today students began the Probability Test, and most will finish next week during SMART Block.
Homework: Check your answers to the Finding All Outcomes homework from Wednesday night. Nothing on the test is more complicated than the first five problems.
1. 12 combinations
2. 6 combinations
3. 2/8 = 1/4 = 25%
4. 3 children each with 2 chances - boy or girl so, 3 children/6 possible outcomes or 50%
5. each combination of die with the spinner results in a 50% chance of adding to an even number
6. 3 pres candidates x 4 vice pres x 4 secretary x 2 treasurers = 96 combinations
7. 2 tv types x 7 sizes x 3 brands = 42 combinations
8. 26 ABC's x 26 ABC's x 26 ABC's x 26 ABC's x 10 digits 0-9 = 4,569,760 combinations
9. each of the 6 sides of the die has 3 letter options for a total of 18 combinations
10 a. 26 x 26 x 10 x 10 x 10 = 676,000 combinations
10 b. 26 x 25 x 10 x 10 x 10 = 650,000 combinations
In class today we looked at the final section of probability - finding out all possible outcomes from combinations of events. As promised on Monday of this week, and it has been on the board all week, we will test Friday on probability.
Homework: Complete problems 1-10 on the back of the notes/class work page about Finding All Outcomes. I will post the answers tomorrow.
Today in class we discussed how to know when to subtract areas before finding the probability, and when you do not need to do so.
Homework: Watch the Wake County video on Math Probability Trees and take notes. Students wrote down the directions to find the video in class.
In class today we discussed again how to calculate independent and dependent probabilities. We also moved on to geometric probability which involves finding areas and putting those numbers into a fraction - both of which we know how to do.
Homework: Complete the right hand side of the page of notes from class today.
Answers to homework blanks:
Rectangle/3 Circles problem Parallelogram/Triangle problem
108 square inches 320 square inches
28.26 square inches 112 square inches
84.78 square inches 432 square inches
23.22 square inches 320 square inches
23.22/108 = 0.215 square inches 320/432 = 20/27 = 0.741
23.22/108 or 21.5% 20/27 or 74.1%
Triangle/Circle problem Triangle/Parallelogram problem
120 square inches 192 square centimeters
28.26 square inches 64 square centimeters
91.74 square inches 128 square centimeters
91.74/120 = 0.7645 128/192 = 2/3 = 0.6667
91.74/120 or 76.5% 2/3 or 66.7%