Grade 8 Math

Minds On Please define histogram:  A graph with bars that show frequencies of data organized into intervals; the intervals line up side by side, without gaps, in the number line

Please choose the best graph that can represent the data below: When you want to display the height of a class to see how many students in one class meet the height requirement required by attractions in Wonderland  A. a bar graph  B. a pictograph  C. a line graph  D. a scatter plot  E. a stem-and-leaf plot  F. a circle graph  G. a Histogram

Please choose the best graph that can represent the data below: When you want to see how much percentage of Tax is spent on Education:  A. a bar graph  B. a pictograph  C. a line graph  D. a scatter plot  E. a stem-and-leaf plot  F. a circle graph  G. a Histogram

Please choose the best graph that can represent the data below: When you try to see whether the students in the class prefer hockey or soccer  A. a bar graph  B. a pictograph  C. a line graph  D. a scatter plot  E. a stem-and-leaf plot  F. a circle graph  G. a Histogram

Please choose the best graph that can represent the data below: When you want to see the biggest improvement time period of a hockey team  A. a bar graph  B. a pictograph  C. a line graph  D. a scatter plot  E. a stem-and-leaf plot  F. a circle graph  G. a Histogram

Please choose the best graph that can represent the data below: When you want to find out the relationship between two values  A. a bar graph  B. a pictograph  C. a line graph  D. a scatter plot  E. a stem-and-leaf plot  F. a circle graph  G. a Histogram

Please choose the best graph that can represent the data below: When you want to see how long roughly it takes 32 students to go to school  A. a bar graph  B. a pictograph  C. a line graph  D. a scatter plot  E. a stem-and-leaf plot  F. a circle graph  G. a Histogram

Homework Checking Please get your homework out Please find a shoulder partner and exchange your homework Please check homework 4 and 8

Grade 8 Math

Definition & Calculation Mean: Median: Mode: 2, 4, 8, 9, 10, 12, 15, 18, 20, 22  Comparing groups of data by: comparing the mean, median & mode

Experiment Textbook reading: page 108 Demonstration: volunteer for dropping and recording? Calculation:  Mean:  Median:  Mode:

It’s your turn! 1. Group!  One dropper  One catcher & recorder 2. Repeat the experiment for 10 times, record the response times down 3. Switch with your partner, repeat for 1o times, record the response times down 4. Calculation:  The mean, median and mode (3m)  Drop the least measurement & recalculate the 3m  Drop the greatest measurement & recalculate the 3m  Drop both the least and the greatest & recalculate the 3m

Think: Was the mean, the median, or the mode affected more by leaving out the least and greatest measurements? Why? Was the mean, median, or the mode a better indicator of your reaction time? How did your means, medians, and modes help you compare your reaction time with the reaction times of the other students in your class?

Think: Textbook Page 110 Question 4

Ticket-Out-Of-The-Door One new thing that I have learned today Homework Textbook 109 example 1 & page 110, question 5, 7