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Bellwork August 15, 2011

Bellwork August 15, 2011. *Silently go to your assigned seat. *Copy Homework into your Planner. *Begin work on Weekly Review #2. In your math binder…. On the front cover and the first page of your binder paper write the following: Your name (first and last) Mrs. Goshorn-Math Team 7-1

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Bellwork August 15, 2011

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  1. Bellwork August 15, 2011 *Silently go to your assigned seat. *Copy Homework into your Planner. *Begin work on Weekly Review #2.

  2. In your math binder…. • On the front cover and the first page of your binder paper write the following: • Your name (first and last) • Mrs. Goshorn-Math • Team 7-1 ---------------------------------------------------- • FOLLOW ALONG AS WE SET UP YOUR BINDER!!

  3. Let’s Do Some Math with Jack Black… • http://www.youtube.com/watch?v=aa8U0nL-KXg

  4. Unit 1 Chapter 7 Section 1 Frequency Tables, Stem and Leaf Plots, and Line Plots

  5. Standard and Objective Objective: Students will learn to collect, effectively display, and analyze data Standard: M7D1 Students will pose questions, collect data, represent and analyze the data, and interpret results.

  6. Essential Question: • How do a frequency table, stem-and-leaf plot, and a line plot (distribution) help us to organize data?

  7. How is data used in our everyday lives? Explain how data could be used with each picture. 1) Michael Jordan: average points per game, rebounds, how many points his team won/loss by

  8. How is data used in our everyday lives? Explain how data could be used with each picture. 2) Babe Ruth: how many homeruns, hits, RBI’s, and batting average

  9. How is data used in our everyday lives? Explain how data could be used with each picture. 3) Billboard HOT 100: http://www.billboard.com/charts/hot-100#/charts/hot-100 What songs are in the top 100 and how long they have been there? What is the forecast of the song for the future?

  10. How is data used in our everyday lives? Explain how data could be used with each picture. 4) Cars: to see which car prices go up and down, which cars are the most popular, which colors are the most popular, are hybrids and smaller cars more popular than big SUVS?

  11. How is data used in our everyday lives? Explain how data could be used with each picture. 5) M&Ms: How many of each color should go in a bag?

  12. How is data used in our everyday lives? Explain how data could be used with each picture. 6) Weather: Is it going to rain? How hot will it be? What was it like this time last year?

  13. How is data used in our everyday lives? Explain how data could be used with each picture. 7) Your grades! Teachers use data (your grades) to figure out your average.

  14. Show What You Know- Match that Graph • Look at the pictures of the different graphs on the board. • Decide which word describes the graph the best.

  15. Definitions: • frequency table: a way to organize data into categories or groups • cumulative frequency: column in a frequency table that keeps a running total of the frequencies in each category

  16. stem-and-leaf plot: shows how often data values occur and how they are distributed • Leaf: on the plot represents the right-hand digit • Stem: represents the left-hand digits • line plot: shows data on a number line with an x or other mark to show the frequency of the data

  17. Key Word Vocabulary Strategy Example:

  18. Vocabulary Study List (see your handout)

  19. Frequency and Distribution Clip (7:23)http://player.discoveryeducation.com/index.cfm?guidAssetId=DE52C9BA-C713-4E6A-969C-077667CDD6B4&blnFromSearch=1&productcode=USWrite down 3 facts you learn in the clip. 1) Frequency charts allow us to see ___________and ___________more easily. 2)What does a gap in the chart mean? 3) What are the 3 measures of central tendency mentioned in the clip?

  20. Closing • In complete sentences write down 5 ways that data is used in our everyday lives (choose ways other than we listed earlier in class). • 1. • 2. • 3. • 4. • 5.

  21. Tuesday, August 16, 2011 • Put Homework (Vocab 7-1 Keywords and Pictures) on the corner of your desk. • Write tonight’s homework in your planner • Take out Weekly Review #2 and continue to work on that.

  22. Unit 1 Chapter 7 Section 1-Day 2 Frequency Tables, Stem and Leaf Plots, and Line Plots

  23. Standard and Objective Objective: Students will learn to collect, effectively display, and analyze data Standard: M7D1 Students will pose questions, collect data, represent and analyze the data, and interpret results.

  24. Essential Question: • How do a frequency table, stem-and-leaf plot, and a line plot (distribution) help us to organize data?

  25. Frequency Tables

  26. A frequency table shows how often something occurs. The frequency may be shown by tally marks or the number. Data is displayed numerically.

  27. A frequency table is best used to keep track and organize data!

  28. Problem Solving Using Tables Brain-Pop • Copy and answer as you watch the brain-pop. • How can you use tables to solve problems? http://www.brainpop.com/math/dataanalysis/problemsolvingusingtables/

  29. A frequency table contains 3 columns. # of Cats in Homes

  30. Class Exercise What type of soda is your favorite?

  31. Choose one of the following…. • Coke • Mountain Dew • Dr. Pepper • Sprite • Diet Coke

  32. Now, create a blank frequency table. Does it look like this? Favorite Soda

  33. Now, complete the table. Compare your frequency table with your neighbor’s. Are they the same? Any differences?

  34. Cumulative frequency is the total of a frequency and all the frequencies above it in a frequency table. • It is a running total of the frequencies in each category. • You determine the cumulative frequency by adding the top frequency to the next frequency, and then to the next frequency, and so on. • The total number in your cumulative frequency should equal the total number of data in your table.

  35. Steps for Organizing and Interpreting Data in a Cumulative Frequency Table • Choose a scale that includes all of the data values. Then separate the scale into equal intervals. • Find the number of data values in each interval. Write these numbers in the “Frequency” column. • Find the cumulative frequency for each row by adding all of the frequency values that are above or in that row.

  36. February Temperatures in 20 Cities Cumulative Frequency Average Highs Frequency Example 1: The list shows the average high temperatures for 20 cities on one February day. Make a cumulative frequency table of the data. How many cities had average high temperature below 59 degrees? 69, 66, 65, 51, 50, 50, 44, 41, 38, 32, 32, 28, 20, 18, 12, 8, 8, 4, 2, 2 17 cities 0–19 7 7 20–39 5 12 40–59 5 17 20 3 60–79

  37. English Exam Grades Cumulative Frequency Grades Frequency Example 2: The list shows the grades received on an English exam. Make a cumulative frequency table of the data. How many students received a grade of 79 or below? 85, 84, 77, 65, 99, 90, 80, 85, 95, 72, 60, 66, 94, 86, 79, 87, 68, 95, 71, 96 8 students 60–69 4 4 8 70–79 4 80–89 6 14 20 90–99 6

  38. Closing What is the purpose for a frequency table?

  39. Homework

  40. Nurses’ Ages Cumulative Frequency Ages Frequency Bellwork August Copy and answer the following question. Have your homework out on your desk. • The data shows the ages of some hospital nurses. • 33, 35, 23, 39, 23, 24, 34, 21, 57, 45, 57, 60, 45, 24, 31, 42, 61, 45, 35, 38 • Make a cumulative frequency table of the data. How many of the nurses are under the age of 40? Answer:

  41. Nurses’ Ages Cumulative Frequency Ages Frequency 20–29 5 5 30–39 7 12 40–49 4 16 50–59 2 18 60–69 2 20 Bellwork Answer… • The data shows the ages of some hospital nurses. • 33, 35, 23, 39, 23, 24, 34, 21, 57, 45, 57, 60, 45, 24, 31, 42, 61, 45, 35, 38 Answer: 12 nurses are under the age of 40.

  42. Unit 1 Chapter 7 Section 1-Day 3 Frequency Tables, Stem and Leaf Plots, and Line Plots

  43. Standard and Objective Objective: Students will learn to collect, effectively display, and analyze data Standard: M7D1 Students will pose questions, collect data, represent and analyze the data, and interpret results.

  44. Essential Question: • How do a frequency table, stem-and-leaf plot, and a line plot (distribution) help us to organize data?

  45. Stem and Leaf Plot

  46. A stem and leaf plot can be used to look at how data is distributed.

  47. Vocabulary • Stem – anything to the left of the very last number (sometimes that is “0” ; sometimes it is two numbers) • Leaf – the last number • Key – an explanation of the stem and leaf

  48. Steps for Organizing and Interpreting Data in a Stem-and-Leaf Plot • Order the data from least to greatest. Use tens digits for the stems and ones digits for the leaves. • List the stems from least to greatest on the plot. • List the leaves for each stem from least to greatest. • Add a key and a title.

  49. Create a Stem and Leaf Plot Collect Data: About how many hours per WEEK do you sleep? Take one night and multiply by 7. Ex. 9 hours per night. 9 x 7 =63 hours Write that DOWN! Now, we will create the plot.

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